Z3+ Signals, No GSM, jumping 3g. - Xperia Z4/Z3+ Q&A, Help & Troubleshooting

Hello.
I bought my phone just 3 days ago together with my gf.
She bought the exact same phone and same carrier as me on the same shop..
Around here we are supposed to have good 3g signals all over, but not inside our house, there we can only use GSM.
Her phone works perfectly, with 3-4 bars gsm signals inside house.
But i get nothing when entering house. NO bars what so ever, (even if i pick GSM ONLY from settings).
I got to service menu and read "0 db" on signal.
I tried everything, Clean sim, restart phone, factory settings, changing GSM/3g/4g priority etc, and even tried MY sim in HER phone.
Its defo a hardware/software issue on my phone.
My experiences from 3g and 4g with this phone is that 4g seem stable and good, while 3g (outside my house) seem to often go from max to none all the time. jumps up and down
and sometimes leave me with no signal for 5 minutes until they are back.
I contacted the carrier to check and everything seems fine over there.
Any suggestion? Could it be really possible that i got a faulty antenna? if im going with my phone to the store for a replace they would probably not belive me or take my reason for real
EDIT: Have to add that the past 12 hours of constant trying to figure out the problem i had a few cases with signals while i was trying to switch to "gsm only" but they lasted for 5 seconds and were gone again.

Had the same, send mine back, saw in the log of the repair department that you refreshed the software. But will check
if they have changed something. Comes back in a few days from now.

Related

Is this normal? Signal Loss

Hi:
I have a Tilt on AT&T's network. Today I was about an hour away from home, and noticed a complete loss of signal. My other phone, a Motorola Razr V3xx, had 3 bars of signal at the same time. I had this same problem in the same rural area before, and just assumed there was nothing I could do about it.
This time though I decided to turn off 3G on the Tilt (since I know it can sometimes interfere with reception), and still nothing. Then I did a soft reset (still had 3G off), and I finally found a signal, as well as the Roaming icon.
Is this normal behavior? The Razr also has 3G, but apparently must switch over to edge when it is in a non-3G area. Why would my Tilt need to be manually reset in order to find a signal?
Thanks!
Hi:
I'd really appreciate any reply
Even if it's to tell me that this is unheard of behavior. My warranty is about to expire, and need to have my phone replaced before it expires if this is a fault unique to my phone.
Thanks again!
cincy1020 said:
Hi:
I have a Tilt on AT&T's network. Today I was about an hour away from home, and noticed a complete loss of signal. My other phone, a Motorola Razr V3xx, had 3 bars of signal at the same time. I had this same problem in the same rural area before, and just assumed there was nothing I could do about it.
This time though I decided to turn off 3G on the Tilt (since I know it can sometimes interfere with reception), and still nothing. Then I did a soft reset (still had 3G off), and I finally found a signal, as well as the Roaming icon.
Is this normal behavior? The Razr also has 3G, but apparently must switch over to edge when it is in a non-3G area. Why would my Tilt need to be manually reset in order to find a signal?
Thanks!
Click to expand...
Click to collapse
I'm not sure why but your phone should have switched automatically. For me, I have my band set to GSM manually.
Are you using usually using 3G with no problem? There's a hardware fault in some devices that will appear about a few months of usage where 3G becomes inoperative. When connected on 3G calls will fail, and one needs to force GSM and reboot to be able to use the phone again. Return to service center needed for repair, mine is there now.
Hi:
Thanks so much for your replies!
I think I probably need a replacement phone, so I guess on Monday I'll call and spend the 15+ hours p) on the phone to AT&T to get a new one, lol.
Kilrah, yes my 3G usually works fine, but apparently when I go into a non 3G area it just loses signal. My phone never really gets great reception anyway, so hopefully the replacement will be an all around improvement.
Thanks again!!

SGS Captivate Got Signal. Can't Use Network

So almost two months of owning my Captivate that I got from Rogers (BNIB from Kijiji) and I noticed that at a certain area in my school, I have 3/5 bars of signal yet I can't seem to text/call and use the network. Is this a network problem or phone problem? Or can it also be my SIM? My SIM card is pretty old. However everything was fine when I use my Sony Ericsson W715 in the same area.
I should add that my friends on the same network beside me, they can text/call fine, which leads me to believe that this is a phone problem. A poster over at Howard Forums suggested network congestion, but it seems impossible because everyone else can use their phone fine.
I've tried different modems too, but it doesn't help. It's like my Captivate doesn't want to work at certain areas of my school.
A couple of people are getting the same problem as well where the phone reports good signal, but they can't use the network at certain locations. We're starting to think that this is a phone problem...
geokilla said:
A couple of people are getting the same problem as well where the phone reports good signal, but they can't use the network at certain locations. We're starting to think that this is a phone problem...
Click to expand...
Click to collapse
I noticed this same issue in fringe areas. I have ATT and in southern Utah they are quite weak. I wonder if the bars/signal are actually from another provider like T-Mobile or some off brand like alltel or something. Utah has a bunch of small providers in rural areas.
Specifically in my case I go up in the mountains at Brianhead Ski resort and i get 2 or 3 bars yet I cannot send texts or call. Verizon has coverage there and I heard rumor T-mobile had a microcell or something on one of the lodges.
Could the signal be from another provider that ATT doesnt have an agreement with? Or in the OP's case some provider besides his own?
That's highly unlikely though, the idea of my phone roaming onto another network. It'd show if I'm not on the Rogers network.
Plus, a lot of people use Rogers, such as my friends who are able to make calls and send texts when they are next to me while I can't at school.
Just an update. Switched to a new SIM card, no go. Got a reconditioned Captivate, still got the same problem. As always, everyone else around me could send and receive text messages fine.
Same thing happened to me twice today with the reconditioned Captivate, at two different locations. As usual, it happened to me at Ted Rogers School of Management on the 8th floor where it showed I had 3 bars and a 3G connection. However when I tried to send a SMS, make a call, or browse the web, nothing worked. Everyone else around me was fine though, so I still can't determine whether it is a network or phone problem. I already switched the SIM out for a new one too.
The 2nd time it happened to me today was just outside of the subway station. Keyword is outside. I wasn't underground. I had full bars, but again I couldn't use the network.
Click to expand...
Click to collapse
geokilla said:
Just an update. Switched to a new SIM card, no go. Got a reconditioned Captivate, still got the same problem. As always, everyone else around me could send and receive text messages fine.
Click to expand...
Click to collapse
I still think it that in some cases our phones pick up out of network signals and show great signal strenght.
Maybe not in your case since others are working fine around you, unless they are bone stock maybe, and you have obviously improved your phone.
I did a bunch of expeirmentation with my phone, flashing different modems and such, trying to get an ATT signal at Brianhead Ski resort in Utah.
I could get the phone to show great signal on the bars and in settings/about phone/status but the service state and network would say unknown or unavailable, somthing like that. (maybe check those when you cant get out?)
I have since given up and reflashed so many times I dont remember which modem worked to give me good signal of networks I couldnt use.
I do know it was frustating as hell to have full bars and be unable to call or send texts.
FireRaider said:
I still think it that in some cases our phones pick up out of network signals and show great signal strenght.
Maybe not in your case since others are working fine around you, unless they are bone stock maybe, and you have obviously improved your phone.
I did a bunch of expeirmentation with my phone, flashing different modems and such, trying to get an ATT signal at Brianhead Ski resort in Utah.
I could get the phone to show great signal on the bars and in settings/about phone/status but the service state and network would say unknown or unavailable, somthing like that. (maybe check those when you cant get out?)
I have since given up and reflashed so many times I dont remember which modem worked to give me good signal of networks I couldnt use.
I do know it was frustating as hell to have full bars and be unable to call or send texts.
Click to expand...
Click to collapse
Thanks for your insight. The other people around me have other phones, such as Blackberry, Samsung Wave, etc. I even tested it with my old Sony Ericsson W715 and my friend's Samsung Wave at pretty much the same location (a feet or two away from me) when I can't use the network, and everything is fine so it most likely is a phone problem.
When it shows I have signal, it also shows the service state, like I'm on the Fido network and such.

Signal problems

I already posted about this problem but then I thought it was due to sleep mode.
So I still have signal problems with my One.
I saw that I had only one or two bars for the signal where I had a lot better reception with other phones.
I already put my sim card into a Galaxy S3 and a Galaxy Y, both of them have a far better reception than the One (4 to 5 bars).
My phone was already sent back for repair three times, they already swapped my motherboard two times, but it does not help.
The last time I got a bit angry in the shop so they took my phone in to test it out.
After four days they said they had no signal problems.
Last resort, another swap of the sim card card but now the signal is even worse.
I did notice when rebooting the phone it starts of with five bars and after two minutes or so it goes down to one or two.
When making a call with one bar it goes up when calling to four or five, some time after the call it goes down to one or two.
I already installed signal Guard Pro to check for effective signal loss and I had quite a lot durng the day as during the night.
I got the name of the customer service manager for the Benelux and France (Aernout Arends) but I do not have any contact information of this man apart from his linkedin.
So I sent him a Linked In invitation. If he responds I can ask him about this phenomenon.
Before the One I had a Sensation XE which I was very pleased with, since running on the One this problems started after a couple of months and since then it keeps on going.
I'd like to solve this since it was an expensive phone, apart from the signal loss I'm still very pleased with it but in the end a phone is used for calling and with a bad signal this is compromised.
I hope anyone out there can help me (or somebody at HTC), if not I need to buy another phone and I think I cannot sell this one since it isn't working properly.
deboopi2 said:
I already posted about this problem but then I thought it was due to sleep mode.
So I still have signal problems with my One.
I saw that I had only one or two bars for the signal where I had a lot better reception with other phones.
I already put my sim card into a Galaxy S3 and a Galaxy Y, both of them have a far better reception than the One (4 to 5 bars).
My phone was already sent back for repair three times, they already swapped my motherboard two times, but it does not help.
The last time I got a bit angry in the shop so they took my phone in to test it out.
After four days they said they had no signal problems.
Last resort, another swap of the sim card card but now the signal is even worse.
I did notice when rebooting the phone it starts of with five bars and after two minutes or so it goes down to one or two.
When making a call with one bar it goes up when calling to four or five, some time after the call it goes down to one or two.
I already installed signal Guard Pro to check for effective signal loss and I had quite a lot durng the day as during the night.
I got the name of the customer service manager for the Benelux and France (Aernout Arends) but I do not have any contact information of this man apart from his linkedin.
So I sent him a Linked In invitation. If he responds I can ask him about this phenomenon.
Before the One I had a Sensation XE which I was very pleased with, since running on the One this problems started after a couple of months and since then it keeps on going.
I'd like to solve this since it was an expensive phone, apart from the signal loss I'm still very pleased with it but in the end a phone is used for calling and with a bad signal this is compromised.
I hope anyone out there can help me (or somebody at HTC), if not I need to buy another phone and I think I cannot sell this one since it isn't working properly.
Click to expand...
Click to collapse
is it switching networks (3g/4g LTE)? voice can't use LTE 4g, so it will drop back to 3g for calls and then go back to LTE 4g once the call is done.
signal bars are a really poor way to understand your signal strength. there are some apps that help (network signal info for example) which show your strength in a more efficient manner, as well as what network type you're connected to.
cr1960 said:
is it switching networks (3g/4g LTE)? voice can't use LTE 4g, so it will drop back to 3g for calls and then go back to LTE 4g once the call is done.
signal bars are a really poor way to understand your signal strength. there are some apps that help (network signal info for example) which show your strength in a more efficient manner, as well as what network type you're connected to.
Click to expand...
Click to collapse
I turned 3G/4D off, I only turn it on when necessary, so that won't be the cause.
I installed network signal info right now and when I have one bar signal, this app gives me -102 db to -105db and it's over haf of its bars here, this info seems to look like mi signal is a lot better than the one bar I got.
deboopi2 said:
I turned 3G/4D off, I only turn it on when necessary, so that won't be the cause.
I installed network signal info right now and when I have one bar signal, this app gives me -102 db to -105db and it's over haf of its bars here, this info seems to look like mi signal is a lot better than the one bar I got.
Click to expand...
Click to collapse
you can set a value in your build prop that is specific to signal 'adjustments' from your particular provider. might then give you more realistic values along the lines of the Network Signal Info app.
I'm sorry I can't direct you to the link as I don't have it bookmarked.
*edit*
found it: http://forum.xda-developers.com/showthread.php?t=2594804

Data connection is suddenly not working

After 2-3 days of not messing with the phone anymore (flashing, putting root apps, etc) my somewhat alright LTE signal has now turned into 3G with no circle around it meaning it's connected to the network, but not actually getting data. It happened while I had the phone in standby for a few minutes, so I can't think of any one app that caused it. Reinstalled rom even after a full wipe.
The strange thing is I will sometimes get a faint signal of 3G which then dissapears within a minute. I did the latest OTA before I flashed my rom so I should have the newest radios and everything. I can't update profile either. My family is getting good signal so I know it's something with my phone. Any ideas?
Happened to me too..I re activated with Hands Free activation to reset the data connection to Sprints network..Only worked twice for me through out the day then the phone was just stuck in the same spot as yours (3G with circle around it). Nothing we did reset the data link to sprints network(cust. svs rep).I brought the phone back to where I bough it and they didn't allow an exchange unless they held the phone over night to test it..I didn't have time for it and everything i hear about the Triband set up Sprint is doing not allowing data while in a call and the growing pains of the network rebuild have worn down on me after 10 years so i had to return the phone and buy it on a network that allowed the phone to operate the way it was meant to..
When I first got the phone, it would hold an LTE signal much better than my m7. Then last night I notice LTE cutting in & out where it was pretty stable before. I check it was trying to connect to Band 26 which is 800 LTE. It might have been from a further away tower. This was the first time I have ever seen Band 26 in my area which is currently being deployed. The constant cutting in & out also drains my battery down. This has nothing to do with my phone but the towers which my home tower has been having issues since last July. For now I set my phone to CDMA only since I have wi-fi at home & work anyway I don't need the phone on LTE. Even when LTE was working on 1900 which was stable, the signal was still pretty week and would drain more batter than a strong 1X signal. Since LTE is data only right now, there is no reason to have the phone prefer LTE when wi-fi is on. With CDMA only it's not bouncing around all over the place.

Frequent Random Network Drops

I've seen a number of threads where people post about their device dropping network data connectivity, and needing a reboot to solve it.
My issue is a bit different. Occasionally (I've noticed it 3-4 times today) when I go to send a text (SMS) or to use a data enabled service like Hangouts, that my phone shows no bars at all.. not even just no data, but the bars are grey and there's a red x. I wait about 15 seconds and it reconnects, then another 10 seconds later, the data is live again.
Phone is a private sale and under 1 month old, and all the Stamina functions are off.. I do see that the "Queue background Data" is turned on, but I don't think this should effect, no?
Not sure what digits I should be looking at to know if this might be a hardware vs software issue.. build is listed as .93
Im no stranger to unlocking and flashing, but I've kept this stock cuz it's tight and I adore the battery life.
Suggestions?
sh0nuff said:
I've seen a number of threads where people post about their device dropping network data connectivity, and needing a reboot to solve it.
My issue is a bit different. Occasionally (I've noticed it 3-4 times today) when I go to send a text (SMS) or to use a data enabled service like Hangouts, that my phone shows no bars at all.. not even just no data, but the bars are grey and there's a red x. I wait about 15 seconds and it reconnects, then another 10 seconds later, the data is live again.
Phone is a private sale and under 1 month old, and all the Stamina functions are off.. I do see that the "Queue background Data" is turned on, but I don't think this should effect, no?
Not sure what digits I should be looking at to know if this might be a hardware vs software issue.. build is listed as .93
Im no stranger to unlocking and flashing, but I've kept this stock cuz it's tight and I adore the battery life.
Suggestions?
Click to expand...
Click to collapse
check in settings in network and set your network to the one you use , like gm/wcdma /lte , maybe your phone is strugling to find 3g or 4g , try it , who knows it might solve the issue , ty
Been about a month since I posted, and I'm still experiencing this issue. I often thumb my phone on and it's not connected. I don't really mind waiting for the 30 seconds or so that it takes to jump back on the network, but it often means I miss calls, and since it's my business phone, it kinda bums me out to suddenly get a VM notification of a missed call even though it never rang.
Is there some sort of utility that I can use to monitor the network activity to see how frequently it drops, and for how long? I've looked into ones on Play but they don't seem to have a history, just something that shows what data up and down is currently being reported.
Sadly the only Sony store in my city (and I think the country - Canada) has recently closed for good, so I'm not sure how to go about warranty repairs...
sh0nuff said:
Been about a month since I posted, and I'm still experiencing this issue. I often thumb my phone on and it's not connected. I don't really mind waiting for the 30 seconds or so that it takes to jump back on the network, but it often means I miss calls, and since it's my business phone, it kinda bums me out to suddenly get a VM notification of a missed call even though it never rang.
Click to expand...
Click to collapse
I don't have a solution, but I can tell you that you're not alone. I've been experienced the same thing on my Z3C. I sometimes wonder if it has anything to do with the fact that the MVNO I use doesn't support 4G LTE.
kopsis said:
I don't have a solution, but I can tell you that you're not alone. I've been experienced the same thing on my Z3C. I sometimes wonder if it has anything to do with the fact that the MVNO I use doesn't support 4G LTE.
Click to expand...
Click to collapse
Interesting.. Your issue isn't just data, but a complete network disconnection? Im with Fido which is an MVNO under Rogers, but I thought they supported LTE. The issue also persists even on wifi
sh0nuff said:
Interesting.. Your issue isn't just data, but a complete network disconnection? Im with Fido which is an MVNO under Rogers, but I thought they supported LTE. The issue also persists even on wifi
Click to expand...
Click to collapse
Yes, it seems to be a complete loss of the mobile connection. When I wake the phone I see gray bars and a red X on the signal strength indicator. Within seconds the phone re-acquires and the indicator goes to 2 or 3 bars. I have also seen it happen with wifi active. The frustrating part is that it doesn't seem to do it often enough to troubleshoot. I'll notice the problem maybe a couple of times a month and there's nothing obviously different about my usage patterns in those instances.
Mine does it at least a dozen times a day. I can only assume this as I frequently miss calls and at least 3-4 times a day I see it happen. =(
Same Problem
Randomly I have no connection at all but after a few seconds everything wents back to normal. Did not have this problem with T-mobile in Germany but with with O2 I have. With T-mobile I had LTE but with O2 I don't, so I guess that's the reason.
Interesting... I've disabled LTE and now have it on 3g/GSM. We'll see how it works moving forward, and I'll post again in a week. Stay tuned.
Service Providers
In the mobile network settings one can change the service provider manually. With LTE enabled my provider has three entries: LTE, 3G and 2G. Connecting two LTE fails, because my provider blocked it in my plan. Having LTE enabled, it often tries to connect to LTE I assume. I switched off LTE and set the provider manually to 3G. Maybe that helps. We'll see.
realTobbse said:
In the mobile network settings one can change the service provider manually. With LTE enabled my provider has three entries: LTE, 3G and 2G. Connecting two LTE fails, because my provider blocked it in my plan. Having LTE enabled, it often tries to connect to LTE I assume. I switched off LTE and set the provider manually to 3G. Maybe that helps. We'll see.
Click to expand...
Click to collapse
Interesting.. I have LTE as part of my network and plan... But once I made changes to the settings as I indicated, I no longer receive the network drops I originally experienced.. I might just be missing the alerts, but it seems fixed... #crossedfingers

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