Database Develop

How to get an X1i onto AT&T's 3G network?

So I've done my best to scour the seemingly millions of posts on this site, and I've found lots of useful info. What I really need is a "ROM" or "patch" or whatever you'd call it that will get my X1i onto AT&T's 3G network. I live in the Florida Keys where we have both 3G and Edge networks. For what ever reason my phone will always get on the Edge. While in Atlanta in May I was all over their 3G in certain areas. So I know my phone will use 3G, just not where I live. Any help would greatly be appreciated.

I am looking for this fix too. Hopefully in a ROM form.
I have the X1i but my carrier (Rogers/Fido) would work 3G only if I ha the X1a, would the X1a ROM be able to fix that?

No, ROMs won't control or overcome the limitations of the the physical hardware.. if you have an X1i (900/1900/2100) it will not be able to work no matter what in areas that require the 850 Mhz band.
AT&T has some 1900 Mhz 3G areas, but it is spotty as best. Canada used to have some 1900 Mhz 3G test areas in GTA, but Rogers has switched to 850 Mhz/1900 Mhz dual bands almost completely.
You're kind of out of luck if you have an X1i in North America.

lazyjai said:
No, ROMs won't control or overcome the limitations of the the physical hardware.. if you have an X1i (900/1900/2100) it will not be able to work no matter what in areas that require the 850 Mhz band.
AT&T has some 1900 Mhz 3G areas, but it is spotty as best. Canada used to have some 1900 Mhz 3G test areas in GTA, but Rogers has switched to 850 Mhz/1900 Mhz dual bands almost completely.
You're kind of out of luck if you have an X1i in North America.
Click to expand...
Click to collapse
Yea, it just depends on the area. In NC, ATT 3G is deployed on 1900MHz, but in other states where ATT has 850MHz, they may deploy 3G on the 850MHz band.

Pablon said:
So I've done my best to scour the seemingly millions of posts on this site, and I've found lots of useful info. What I really need is a "ROM" or "patch" or whatever you'd call it that will get my X1i onto AT&T's 3G network. I live in the Florida Keys where we have both 3G and Edge networks. For what ever reason my phone will always get on the Edge. While in Atlanta in May I was all over their 3G in certain areas. So I know my phone will use 3G, just not where I live. Any help would greatly be appreciated.
Click to expand...
Click to collapse
this may sounds stupid.... but you can move to the area that has 3G signal... that way you will get 3G in where you live
otherwise... what lazyjai said sums it all....

I have that problem as well...
I have an X1i and I cannot get it to go into 3G for the life of me! My fiance who has ATT as well has 3G all the time (he has a simpler phone lol) not fair... every now and then itll go into 3G for a few seconds at the most, then back to EDGE.
Have you found a fix to this yet?

If you have updated to the latest and greatest @ R3....try reflashing the device to the original R1....when I flashed to R3 edge was my primary signal...has to do with what they changed in the rilphone.dll...
Regards,
WC
Erinc2005 said:
I have that problem as well...
I have an X1i and I cannot get it to go into 3G for the life of me! My fiance who has ATT as well has 3G all the time (he has a simpler phone lol) not fair... every now and then itll go into 3G for a few seconds at the most, then back to EDGE.
Have you found a fix to this yet?
Click to expand...
Click to collapse

Wild Child said:
If you have updated to the latest and greatest @ R3....try reflashing the device to the original R1....when I flashed to R3 edge was my primary signal...has to do with what they changed in the rilphone.dll...
Regards,
WC
Click to expand...
Click to collapse
I have no idea what that means, Im not that technically inclined, but I'm not totally stupid. I just don't understand all the terms and such.... I can research it though! I would really like 3G, as I'm sure the thread starter if he hasnt gotten it already.

As lazyjai said, you can't get an X1i on ATT 3G in north america. It's not a software thing, its a hardware thing. The X1i does not have the parts it would need to run on 3G in america. Thats why the X1a was made with american 3G parts. X1american (X1a) vs. X1international (X1i). So, there is no way to make it run ATT 3G in america (This includes roms, cabs, etc...).

Incorrect....
◦GSM/GPRS/EDGE 850/900/1800/1900
◦UMTS/HSDPA/HSUPA 900/1700/1900/2100 MHz
◦UMTS/HSDPA/HSUPA 850/1700/1900/2100 MHz
X1i will work on these frequencies....so if the 3g or higher signal is available in your area it will use it...if not then you are stuck on the edge frequency...I know in Orlando/surrounding area's they are upgrading the network so it may be readily available shortly....
http://cellularmap.net/att_850_1900.shtml
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Regards,
WC
scottyonlive said:
As lazyjai said, you can't get an X1i on ATT 3G in north america. It's not a software thing, its a hardware thing. The X1i does not have the parts it would need to run on 3G in america. Thats why the X1a was made with american 3G parts. X1american (X1a) vs. X1international (X1i). So, there is no way to make it run ATT 3G in america (This includes roms, cabs, etc...).
Click to expand...
Click to collapse

You can flash to an earlier build of the rom...but I would suggest hardspl, then flashing to 1.11.25.76 radio....there are plenty of tutorials on here for both procedures...p.m. if you need assistance....
Regards,
WC
Erinc2005 said:
I have no idea what that means, Im not that technically inclined, but I'm not totally stupid. I just don't understand all the terms and such.... I can research it though! I would really like 3G, as I'm sure the thread starter if he hasnt gotten it already.
Click to expand...
Click to collapse

theres 1900+850 band inside major cities in the U.S atlanta , miami, san fran , LA , NYC , etc , you basically can use 3g in these cities but most non major cities just have 850

Guys there is NO fix for this.
AT&T has deployed their 3G network in the US on the 850MHz and 1900MHz bands. Depending on the area, both of these 3G bands, or either one maybe deployed. I have an X1a. In NC, AT&T only has a license for the 1900MHz band, for example. When I was in Baltimore, I was using the 850MHz 3G band.
The X1a support 3G frequency bands - 850MHz/1900MHz/2100MHz - ie. there is a hardware power amplifier for these three bands ONLY.
X1i - 900MHz/1900MHz/2100MHz - ie. there is a hardware power amplifier for these three bands ONLY.
Physical hardware limitation.
If your area has 850MHz 3G and you are using a X1i, you will NOT or EVER get 3G on the 850MHz band.
This has been discussed ad nauseum. If there was a fix, I'm sure the brilliant minds at XDA would have found it already.

Wild Child said:
Incorrect....
◦GSM/GPRS/EDGE 850/900/1800/1900
◦UMTS/HSDPA/HSUPA 900/1700/1900/2100 MHz
◦UMTS/HSDPA/HSUPA 850/1700/1900/2100 MHz
C
Click to expand...
Click to collapse
Wrong. Neither supports 1700MHz on UMTS/HSPA.
Both do quadband GSM/GPRS/EDGE 850/900/1800/1900
X1i 900/1900/2100
X1a 850/1900/2100

X2a coming to America! $300 price difference between X2 and X2a, why is this?

Haven't found any specs as to why there is a massive price difference... anyone know?

where did you find this price tag?

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This is where I purchased my X2 when it first came out.

The X2a is especially for North America...

X2a has NAM 3G bands while the X2i has EURO 3G Bands. That is the only difference.
NAM models always have a higher price, its always been that way.

akay_7 said:
X2a has NAM 3G bands while the X2i has EURO 3G Bands. That is the only difference.
NAM models always have a higher price, its always been that way.
Click to expand...
Click to collapse
Any difference in performance?

nope....no performance changes
unless you need NAM 3G the X2i would be a better buy, and euro spec phones are prone to more frequent updates

akay_7 said:
nope....no performance changes
unless you need NAM 3G the X2i would be a better buy, and euro spec phones are prone to more frequent updates
Click to expand...
Click to collapse
The NAM X1 received just as many updates as its Euro counterpart (2).

royalbloodvi said:
This is where I purchased my X2 when it first came out.
Click to expand...
Click to collapse
Could you please let me know exactly what site is? I will probably buy the X2/X2a in the next month and am looking for the X2a but don't know where to find. Although this price difference may be an important consideration.
Thanks

if it's like the x1i vs. x1a then the difference in performance is that 30fps video capture is disabled in x1a because of a patent issue between qualcomm and broadcomm and yes it's a hardware issue that can't be fixed by roms or software
but so is the i models not being able to use the USA 3g bands

yes the only difference i notice too is the 850 umts instead of 900 umts band on the NAM edition, pricing wise you might wanna check bestbuy.com because in the states, bestbuy and sonystyle.com actually had the x1 for sale back then for 799.99 I would believe the same will apply to the X2. I am not too sure about the united states market as to i live in Toronto Canada, but the company i work for Rogers wireless will not be getting the X2 yet or at least anytime soon that i know of, instead we will be releasing the X10 sometime in Q2 expecting a mid March release.
Back to the difference in the umts band, i know some carriers in the us has the 1900 umts in certain cities. I know that major cities like NYC will have support for 1900 umts bandwidth, therefore an x2i will be able to connect onto 3g there. If anyone is planning to get the x2i and is planning to use it in Toronto or Vancouver, most carries like Bell, Rogers, Telus will support the 1900 umts band, and the speed and coverage is not bad unless you are in the basement or somewhere surrounded by multiple walls.

Rudegar said:
if it's like the x1i vs. x1a then the difference in performance is that 30fps video capture is disabled in x1a because of a patent issue between qualcomm and broadcomm and yes it's a hardware issue that can't be fixed by roms or software
but so is the i models not being able to use the USA 3g bands
Click to expand...
Click to collapse
So can one buy the X2 (not "a") and and make 850 mhz 3G compatible with software? My carrier in Brazil uses this frequency.... Thanks.

where is the link, without it this thread is useless

"So can one buy the X2 (not "a") and and make 850 mhz 3G compatible with software? My carrier in Brazil uses this frequency.... Thanks."
no as I said the band limitations are in the cpu of the device
i and a dont use the same cpu

Rudegar said:
"So can one buy the X2 (not "a") and and make 850 mhz 3G compatible with software? My carrier in Brazil uses this frequency.... Thanks."
no as I said the band limitations are in the cpu of the device
i and a dont use the same cpu
Click to expand...
Click to collapse
Not CPU, but the power amplifiers. In the X2i, only the 900/1900/2100MHz UMTS bands are amplified. In the X2a, only the 850/1900/2100MHz UMTS bands are amplified. It's still a hardware problem.

royalbloodvi said:
Haven't found any specs as to why there is a massive price difference... anyone know?
Click to expand...
Click to collapse
Less people will be buying the Xperia from the U.S. That's why.

I talked to a Sony rep and he said that the frequencies will not be different between the x2 and x2a...I was planning on buying a x2 from a guy on another forum but now this thread has me a little nervous...so does anybody have any official evidence that there will be different frequencies?

d_a_n_payne said:
I talked to a Sony rep and he said that the frequencies will not be different between the x2 and x2a...I was planning on buying a x2 from a guy on another forum but now this thread has me a little nervous...so does anybody have any official evidence that there will be different frequencies?
Click to expand...
Click to collapse
You mean like CPU frequencies? Or radio (3G/UMTS) frequencies?
CPU...no difference between the two
UMTS...yes

He told me radio...go to their live chat and ask them...

d_a_n_payne said:
He told me radio...go to their live chat and ask them...
Click to expand...
Click to collapse
He's wrong... If you want confirmation just google the specs on both phones. "Customer service representatives... leading people astray since the begining of time"

[Q] is there a possible way to change the frequency??

I am living in Canada, and all galaxy tab available in this country is P1000 which has the frequency band of HSDPA 900 / 1900 / 2100.
But I am in Mobilicity which uses AWS(1700/2100) network like T-Mobile. Therefore, I can't use galaxy tab with my provider.
Is there any possible way I can change the frequency of galaxy tab P1000 to 1700 / 2100 ???
Please~~ anybody has an idea? if it is a software issue, at least I can try~
p.s
if it is impossible, anyone knows a shopping website sells a used t-mobile galaxy tab with shipping at Canada???

I have a very similar issue. I bought a T-mobile tab in California with the promise that it would work in Mexico. What that promise was the truth it wasn't the whole truth.
Mexico's 3g system is in a frequency of 850/1900 mhz. The T-Mobile device is on 1700 mhz. I realize that frequencies are a function of physical antenna length but they can also be tuned (as a radio receiver) which is what a cell phone really is.
Is there a way to tune the receiver part to correctly function on a different frequency?

You two should trade tabs.
T-mobile uses 2100/1700 aws and cannot be changed to other data frequencies. So the best you get is EDGE.
Also, T-mobile tabs have to use both frequencies, so they don't get 3g in places that use only 2100.
At&t uses 1900/850 and cannot be changed either. There are tabs that use 1900/900.
The only quad band tab is the unlocked no carrier version.

gspajon said:
I have a very similar issue. I bought a T-mobile tab in California with the promise that it would work in Mexico. What that promise was the truth it wasn't the whole truth.
Mexico's 3g system is in a frequency of 850/1900 mhz. The T-Mobile device is on 1700 mhz. I realize that frequencies are a function of physical antenna length but they can also be tuned (as a radio receiver) which is what a cell phone really is.
Is there a way to tune the receiver part to correctly function on a different frequency?
Click to expand...
Click to collapse
I use an at&t tab in Mexico with a Telcel sim card and get 3g. When I used a t-mobile tab, I only got EDGE with both aTelcel and a Movistar sim card.

djak420 said:
I am living in Canada, and all galaxy tab available in this country is P1000 which has the frequency band of HSDPA 900 / 1900 / 2100.
But I am in Mobilicity which uses AWS(1700/2100) network like T-Mobile. Therefore, I can't use galaxy tab with my provider.
Is there any possible way I can change the frequency of galaxy tab P1000 to 1700 / 2100 ???
Please~~ anybody has an idea? if it is a software issue, at least I can try~
p.s
if it is impossible, anyone knows a shopping website sells a used t-mobile galaxy tab with shipping at Canada???
Click to expand...
Click to collapse
You can try amazon.com.

rangercaptain said:
You two should trade tabs.
T-mobile uses 2100/1700 aws and cannot be changed to other data frequencies. So the best you get is EDGE.
Also, T-mobile tabs have to use both frequencies, so they don't get 3g in places that use only 2100.
At&t uses 1900/850 and cannot be changed either. There are tabs that use 1900/900.
The only quad band tab is the unlocked no carrier version.
Click to expand...
Click to collapse
Thank you for your response. In my case I cheaped out and bought T-mobile due to its price and the promise of receiving an unlock code. I was ignorant of the frequency issue until now...too late.
So now another question arrises. Since these devices are basically radios, wouldn't it be possible to write a piece of software that is essentially an antena tuner? Remembering my boyhood electonics (ham studies) it seems to me that any size radio antena can be "tuned" to the correct frequency with the right equipment. Or perhaps an after market hardware that utilizes the USB input port?
Just "spitballing" here but it seems to be an idea worth some money considering all of us who want more out of our devices. Any thoughts?

Yeah, buy the device with the right hardware for your carrier.
It's a hardware limitation. No piece of software will ever be capable of fixing it on earth. The hardware is not physically capable of those frequencies.

These devices are digital. When you went to school the radio technology was analog, and you could tune anntenas, but with digital, the wave is fixed only to the built in values, so no tuning possible.
Trading is easier.

@gspajon:
I use a Telcel Amigo sim in a t-mobile tab and a month to month data plan, 3 gigs of data and unlimited voice, for $30, and I can pay the bill through a website, or at any OXXO. The Telcel EDGE is pretty fast for surfing and navigating, and sending/receiving attachments. I can live with it.

Hey ranger I have the same deal and I too am able to find the edge network. However here in Progreso, Yucatan it is painfully slow. I'm sure that is a result of my distance from the main provider signal in Mérida. I am able to access the net and surf at speeds closed to dial-up. It's frustrating considering my tab is capable of so much more.
Botom line is I thought I hade reasearched this BEFORE I bought. The frequency issue never came up untill now...AFTER I spent the money. Oh well...my wife has an iPhone that I bought her here and I can link in to her with the router capability and my tab's wifi.
Thank you for your kind assistance...where in Mexico do you travel? You are welcome to visit here anytime...my house ison the beach and the weather here is almost always lovely.

rangercaptain said:
You two should trade tabs.
T-mobile uses 2100/1700 aws and cannot be changed to other data frequencies. So the best you get is EDGE.
Also, T-mobile tabs have to use both frequencies, so they don't get 3g in places that use only 2100.
At&t uses 1900/850 and cannot be changed either. There are tabs that use 1900/900.
The only quad band tab is the unlocked no carrier version.
Click to expand...
Click to collapse
So what happens when we flash different modems? I thought that changes the supported frequencies?

Many people wish this was true, but the at&t tab has a different radio from t-mobile, and no modem can change that.

gspajon said:
Hey ranger I have the same deal and I too am able to find the edge network. However here in Progreso, Yucatan it is painfully slow. I'm sure that is a result of my distance from the main provider signal in Mérida. I am able to access the net and surf at speeds closed to dial-up. It's frustrating considering my tab is capable of so much more. . .
Thank you for your kind assistance...where in Mexico do you travel? You are welcome to visit here anytime...my house ison the beach and the weather here is almost always lovely.
Click to expand...
Click to collapse
It is too bad about the tabs. I mistakenly bought a t-mobile tab too. I use it as a wifi tab most of the time.
I am a teacher in the US, but weekends and summers I am in Tijuana-Tecate building homes for poor families. We give away 250 homes a year, God willing.
My partner in Mexico grew up in the Yucatan - it is my wish to visit there some day!
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Two homes student from my school built last month.

There is hope
I recently found a new device that allows me to use my tab here in mexico as is. This solution may not work for every one but it is working great for me. I recently purchased a mobile wifi router that works on Mexico's 3g system. Its the Huawei E5.
Its about the size of a small cell phone and I can connect to it using wifi. It is portable so I can just put it in my pocket and off I go. Now I didn't have to worry with unlocking the tab. I just leave the original T-Mobile chip in and use wifi here in Mexico.
I am quite certain this little device is available in Canada as well. That way you (I) can move freey between two nations without the "blah-blah" of this system vs that one and how I "should've bought" differently.
The cost was reasonable and I have stll paid less than an iPad. Not to mention I can also use my laptop here the same way as in the US. The service is very reasonable and is actually less costly than t-moble.

Sprint iDen 800mhz -> Sprint CDMA/LTE 800mhz and the One

So, according to HTC.com and Phonescoop.com, the radio for the Sprint version will have 1900mhz LTE, just as with the HTC Evo 4G LTE. Sprint is supposedly rolling out 800mhz LTE (former Nextel iDen) in the 2nd half of 2013. Question is, can the radio be modified via software to have 800mhz LTE, or is this a hardware issue?
Anyone know?
Thanks!

aschlect said:
So, according to HTC.com and Phonescoop.com, the radio for the Sprint version will have 1900mhz LTE, just as with the HTC Evo 4G LTE. Sprint is supposedly rolling out 800mhz LTE (former Nextel iDen) in the 2nd half of 2013. Question is, can the radio be modified via software to have 800mhz LTE, or is this a hardware issue?
Anyone know?
Thanks!
Click to expand...
Click to collapse
What a mess most of their customers will have, IMO stupid decision. Most people to use this network will need to replace their phones, and it means for you, that you have a decision to make on your LTE future, one which phone you buy or change provider, second option probably the best.
Please note that the Snapdragon 600 chipset does not have any modem support on chip, therefore additional hardware radios are added per requirement. HTC should have gone for the Snapdragon 800 which has a modem that supports LTE as well.
And in short, no you can't just change, it is hardware. However, towards the end of the year hopefully all phones will start to use the Qualcomm chipset announced yesterday which covers all bands worldwide.
HSPA/WCDMA:
Europe/Asia: 850/900/1900/2100 MHz
GSM/GPRS/EDGE:
850/900/1800/1900 MHz
LTE:
EU: 800/1800/2600 MHz
US (AT&T): 700/850/AWS/1900 MHz
US (TMO): 700/AWS MHz
US (Sprint): 1900 MHz
Asia: 1800/2600 Mhz

Re: Sprint iDen 800mhz -> Sprint CDMA/LTE 800mhz and the One
Ok thanks for the clarification that's what I was thinking. Perhaps Sprint will go ahead and pre-load the LTE radio for the former iDen 850 spectrum, and activate it with a firmware update. That's all I can hope for I guess.
Sent from my EVO using xda app-developers app

I read something in this thread about the new Sprint ver One having 800/1900Mhz LTE radio....does this apply here?
http://forum.xda-developers.com/showthread.php?p=38426723

thebbbrain said:
I read something in this thread about the new Sprint ver One having 800/1900Mhz LTE radio....does this apply here?
http://forum.xda-developers.com/showthread.php?p=38426723
Click to expand...
Click to collapse
Very interesting. Not sure what is going on, also not sure if HTC has any clue what is going on. There website is obviously wrong or not up to date. Still doesn't list 800MHz in US.

Looks like the One will only have Sprint band 25 LTE (1900). At least from the FCC figures.
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SVDO is also missing, so no simultaneous 3G and voice. Understandably, though, with the LTE network increase.

Have gone from S1 to S2 with sprint, might go with HTC One instead of S4.
Does only one band of LTE on the phone mean there could be some towers that use the band not included in the phone, so I would only get 3g?

ajent said:
Have gone from S1 to S2 with sprint, might go with HTC One instead of S4.
Does only one band of LTE on the phone mean there could be some towers that use the band not included in the phone, so I would only get 3g?
Click to expand...
Click to collapse
Do you have problems with Sprint now? are you using LTE currently?
Your LTE coverage will only be as good as how many 1900Mhz towers Sprint has around. If sprint doesn't have a tower in your phones range for LTE then you will only get 3G
If you travel a lot with roaming, then you will most likely want the AT&T model which covers most of greater America. If you get LTE while roaming will depend on Sprint and other Carriers agreements, otherwise yes your option will be 3G.

Thanks, I wasn't sure if their towers would have both bands or just 1, I wasn't sure why the phone only having 1900Mhz would matter.
I don't have an LTE phone, but I do have wimax coverage in Daytona, LTE is supposedly on the way. My work forces me to travel a lot, don't get to use 4g much anyway, I'm heavily dependent on roamcontrol, with a hacked PRL I make due with us cellular's 3g usually. When I am in Houston/Daytona I would like my LTE phone to have proper coverage though ;P

Re: Sprint iDen 800mhz -> Sprint CDMA/LTE 800mhz and the One
ajent said:
Thanks, I wasn't sure if their towers would have both bands or just 1, I wasn't sure why the phone only having 1900Mhz would matter.
I don't have an LTE phone, but I do have wimax coverage in Daytona, LTE is supposedly on the way. My work forces me to travel a lot, don't get to use 4g much anyway, I'm heavily dependent on roamcontrol, with a hacked PRL I make due with us cellular's 3g usually. When I am in Houston/Daytona I would like my LTE phone to have proper coverage though ;P
Click to expand...
Click to collapse
What's this I hear about a hacked PRL? Wanna let me in on that?
LTE coverage is great throughout Houston. It gets weak and sometimes drops to 3G when in buildings though.
Sent from my GT-N8013 using Tapatalk HD

ajent said:
Have gone from S1 to S2 with sprint, might go with HTC One instead of S4.
Does only one band of LTE on the phone mean there could be some towers that use the band not included in the phone, so I would only get 3g?
Click to expand...
Click to collapse
Yes you are thinking correctly, however Sprint's 1900mhz is pretty comprehensive, in fact, I believe Sprint has more 1900mhz spectrum than any other carrier (hence why Sprint used to be 'Sprint PCS', referencing the PCS 1900mhz band), and far more 1900mhz spectrum than the old iDen 800mhz. You should not have any problems whatsoever.

Ill just be glad when they roll out 800mhz 3g..which this phone does have suport for. If they finally get around to upgrading the 3g here in Houston then I wont mind as much when the connection drops down. As such, the way it is right now, 3g is nigh on unusable, and sometimes so is 4g.

danw_oz said:
Please note that the Snapdragon 600 chipset does not have any modem support on chip, therefore additional hardware radios are added per requirement. HTC should have gone for the Snapdragon 800 which has a modem that supports LTE as well.
Click to expand...
Click to collapse
It has nothing to do with the modem. The One has a separate Qualcomm MDM9x15 modem which is not that much different than the modem that's integrated into the Snapdragon 800. It has plenty of ports which could handle another LTE band if one could be "fed" to it.
The issue is the front end RF stuff. Due to the uniqueness of the 800MHz LTE band that will be used by Sprint, it's difficult at this point to source the necessary antenna switches and transceivers and other front end RF components that will handle that specific 800Mhz LTE band.
My guess is that you won't see any ESMR800 LTE phones come out before Q3 or Q4 and it's also probably at least six months at this point before Sprint starts to deploy the technology commercially.

greengoldmello said:
Ill just be glad when they roll out 800mhz 3g..which this phone does have suport for. If they finally get around to upgrading the 3g here in Houston then I wont mind as much when the connection drops down. As such, the way it is right now, 3g is nigh on unusable, and sometimes so is 4g.
Click to expand...
Click to collapse
They are not going to roll-out EVDO on 800 MHz, only voice/1x, and a 5x5 LTE carrier.

That is not what I have heard from multiple Sprint reps about EVDO on the 800mhz. I was told, very recently in fact, that the voice/EVDO would be rolled out to the 800mhz, well before any LTE bands were activated in that spectrum. That Sprint was pushing for better penetration for voice and EVDO signals through the 800mhz spread, and that LTE would be focused on the 1900mhz for the time being.

Gaigebacca said:
That is not what I have heard from multiple Sprint reps about EVDO on the 800mhz. I was told, very recently in fact, that the voice/EVDO would be rolled out to the 800mhz, well before any LTE bands were activated in that spectrum. That Sprint was pushing for better penetration for voice and EVDO signals through the 800mhz spread, and that LTE would be focused on the 1900mhz for the time being.
Click to expand...
Click to collapse
According to this article:
http://www.lightreading.com/sprint/sprint-to-dial-800-for-lte-in-q4/240153521
"We expect to deploy LTE on 800MHz in the fourth quarter," said Steve Elfman, president of network operations and wholesale at Sprint on the call.
Nonetheless, Sprint is clearing the way for LTE integration with WiMax partner Clearwire. Hesse said he expects Clearwire's fast 4G service to start arriving late in the third quarter with "TD-LTE, multi-band devices."
With so many different chunks of frequency to support, Sprint will need these devices to switch between 2.5GHz, 800MHz and 1900MHz to get around the network.

ilusnforc said:
With so many different chunks of frequency to support, Sprint will need these devices to switch between 2.5GHz, 800MHz and 1900MHz to get around the network.
Click to expand...
Click to collapse
That's not that unusual and really not that big of a deal for the the radios to handle in the upcoming devices.
In any case, working with multiple bands is fairly commonplace. Look at Verizon and AT&T for example which operate four different bands.

Wow
This has to be the most technical thread I have ever read Where do you folks obtain all this knowledge?

XZ won't connect via HSDPA

Hello everyone! I've searched the forum, didn't find anything similar so I' m posting here. So, got stock XZ C6603, T- mobile, .350 version (no updates yet) and it won't connet via HSDPA, I have wcdma activated but all i get is 3G(+) icon, no H(+), and the download speed is around 2Mbps. On my HTC DHD i can go up to 8Mbps with no problem. I have no signal/reception problems ( full bars). Also, wifi signal is weak but that's another issue, just mentioning it... Anyone knows how to fix this or having the same problem?

Did you try this?
{
"lightbox_close": "Close",
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
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}
It may work it may not but try it anyway you have nothing to lose.

Could be wrong apn settings.
Sent from my C6602 using xda premium

tried it, slight improvement in speed, i think my apn settings are ok, but still no "H" icon, just 3G+. should I try to replace my phone or will the update when I get it fix this problem?

Did you tried a factory reset?
Sent from my C6602 using xda premium

Tried that, didn't help...

Wait for the update or flash another firmware if you to try but backup your firmware first.
http://forum.xda-developers.com/showthread.php?t=2188129
Sent from my C6602 using xda premium

I would imagine that the phone has selected the wrong apn when it first searched for networks.
I would recommend to force a manual search and manual selection.
Settings, more, mobile networks. Check Network mode is lte,even though you are after 3G. Then select mobile operators, it will scan and list all the networks it can see, find the 3g network and select it, make sure the tick remains after you click it.

danw_oz said:
I would imagine that the phone has selected the wrong apn when it first searched for networks.
I would recommend to force a manual search and manual selection.
Settings, more, mobile networks. Check Network mode is lte,even though you are after 3G. Then select mobile operators, it will scan and list all the networks it can see, find the 3g network and select it, make sure the tick remains after you click it.
Click to expand...
Click to collapse
I did do that, the 3G was already selected... if I make an update myself will I lose the warranty? I tried to replace my.device, they told me it needs to be send to service for inspection and if the device is faulty i'll get a new one. Will keep you updated, don't like how things started with my XZ.

bands
Maybe, because the HSDPA in T mobile are in the bands 1700 and 2100, just like the 3G, and the Xperia Z model c6603 uses bands 850/900/1700 only!!! the C6602 model uses the same bands plus /1900/2100 so, if you miss one band in T mobile you will never have the HSDPA speed, no matter the firmware,because is hardware,no software, you can see the bands that t Mobile uses here http://support.t-mobile.com/docs/DOC-4988 and you can see what bands uses the Xperia Z C6603 here http://en.wikipedia.org/wiki/Sony_Xperia_Z
regards

juliospinoza said:
Maybe, because the HSDPA in T mobile are in the bands 1700 and 2100, just like the 3G, and the Xperia Z model c6603 uses bands 850/900/1700 only!!! the C6602 model uses the same bands plus /1900/2100 so, if you miss one band in T mobile you will never have the HSDPA speed, no matter the firmware,because is hardware,no software, you can see the bands that t Mobile uses here http://support.t-mobile.com/docs/DOC-4988 and you can see what bands uses the Xperia Z C6603 here http://en.wikipedia.org/wiki/Sony_Xperia_Z
regards
Click to expand...
Click to collapse
I don't believe that would be the issue since I had no problems with the HTC DHD which suports only HSDPA 900 / 2100, and according to GSMARENA the C6603 supports HSDPA 850 / 900 / 2100...

I went to Tmobile today, tested my micro sim, put it in another phone (got the H+ icon), but the speed was the same as on my XZ. Put it in another C6603 and I noticed that it also lacks the "H+" icon, so what they told me is that 3G+ actually means it connects with HSDPA. So is that normal not to have "H+" icon showing in the signal strength bars?

_z00m_ said:
I went to Tmobile today, tested my micro sim, put it in another phone (got the H+ icon), but the speed was the same as on my XZ. Put it in another C6603 and I noticed that it also lacks the "H+" icon, so what they told me is that 3G+ actually means it connects with HSDPA. So is that normal not to have "H+" icon showing in the signal strength bars?
Click to expand...
Click to collapse
Could be an icon bug in the firmware you are using.
Sent from my C6602 using xda premium

_z00m_ said:
I don't believe that would be the issue since I had no problems with the HTC DHD which suports only HSDPA 900 / 2100, and according to GSMARENA the C6603 supports HSDPA 850 / 900 / 2100...
Click to expand...
Click to collapse
well, according to T mobile
Depending on where a tower is at in the 4G life cycle, theoretical maximum download speeds range from 21 Mbps – 42 Mbps.
T-Mobile's HSPA+ network operates on the same band as our 3G network, Band IV, which uses 1700 MHz and 2100 MHz frequencies to transmit voice and data services. The 1700 MHz frequency sends information to cell sites and the 2100 MHz frequency receives information.
As with our 3G network, both 1700 MHz frequency and 2100 MHz frequency are required for a device to function. If a device only has one of these frequencies, it cannot use T-Mobile’s 3G and 4G networks.
T-Mobile is switching some 1900 MHz frequency from EDGE to HSPA+. This will allow devices that work on 1900 MHz, such as AT&T devices, to use our 4G network.
and yes,the Xperia z uses UMTS HSPA+ Bands 1, 3, 5, 8 which are
1 for 2100, 3 for 1800, 5 for 850 and 8 for 900
This info is according to Sony Official Page www.sonymobile.com, so as you can see you are missing one band, the 1700

_z00m_ said:
I don't believe that would be the issue since I had no problems with the HTC DHD which suports only HSDPA 900 / 2100, and according to GSMARENA the C6603 supports HSDPA 850 / 900 / 2100...
Click to expand...
Click to collapse
It doesn't matter what phones you have previously tested with. If your phone does not support the bands your operator uses then it ain't going to work. You can be sure the GSMArena is wrong with many specs on phones, especially HTC phones because HTC makes so many varients it is almost impossible to track or show. If you purchased this HTC phone in the US you can be sure that is supports US networks.
Exactly as stated above, if you do not have 1700 & 2100Mhz for T-Mobile then you will only get 2G