Strange thing with carrier signal???... - Xiaomi Redmi 4a Questions & Answers

I'm from East Europe, Estonia, if important.
I bought that amazing and cheap phone.
It's good for its price, but:
Last week suddenly (on stock ROM) I did not have any possibility to call or answer any calls. Outgoing call ended like after 10 sec wait with nothing.
Incommers did hear nice woman to say, that my phone is "switched off, or out of reach...."
Have to say, that carrier signal AND internet trough LTE are available.
I was sure, that it's about the ROM, but-
After LOOOOOONG process of unlocking bootloader, flashed RR Rom, but "NO CALLS FOR YOU" sign remains.
Toaday I figured out, that I only can use my fresh lover when switching it "GSM only" mode- That means big NO for above of "E" connection.
What if we have LTE here also?
Any smart solution for that?

Related

Problem with Orange branded Kaiser

Has anyone else experienced this problem.
Although the phone shows it is connected to the Orange network quite often voice calls to the phone go straight to the voicemail, it seems that the phone is taking so long to process the call that the network assumes it is switched off and then diverts the call to the voicemail. a text then arrives notifying me of a missed call. Any ideas.
Incidentally I put the sim card back in my Artemis and everything worked OK
alanwesty said:
Has anyone else experienced this problem.
Although the phone shows it is connected to the Orange network quite often voice calls to the phone go straight to the voicemail, it seems that the phone is taking so long to process the call that the network assumes it is switched off and then diverts the call to the voicemail. a text then arrives notifying me of a missed call. Any ideas.
Incidentally I put the sim card back in my Artemis and everything worked OK
Click to expand...
Click to collapse
I too, seem to experience the same issue.. :\
It only seem to occurs after a while that the phone is in "extended sleep mode" (aka press the power key).
Now I'm trying a few things, I've switch the phone to GSM only network to see if THIS might be the issue... but if someone knows anything about this I'd be more than glad to be able to fix the issue
By the way my Kaiser is unbranded, the original HTC one!
You say you get a text re missed call, as opposed to a missed call notification. That would normally mean that the network couldn't see your phone - as normal internal missed calls (ie where you didnt asnwer) wouldn't send a text but would use an internal missed call counter.
So... do you have really weak 3g signal where you are and although the device thinks its connected, it isnt really?
Or is your device faulty...
unwired4 said:
You say you get a text re missed call, as opposed to a missed call notification. That would normally mean that the network couldn't see your phone - as normal internal missed calls (ie where you didnt asnwer) wouldn't send a text but would use an internal missed call counter.
So... do you have really weak 3g signal where you are and although the device thinks its connected, it isnt really?
Or is your device faulty...
Click to expand...
Click to collapse
Well I can say for me that the signal is always allmost full bars.
and I get txt msg saying either I have missed a call or that I have a new voicemail msg (Those are service provided by my carrier) So it's NOT "missed call notification" by WM.
So the network can't see your device when its trying to route a call to it...
Have you tried the device on GSM only? (settings, phone, band, change it from auto to gsm) to see if its a 3g network problem?
unwired4 said:
So the network can't see your device when its trying to route a call to it...
Have you tried the device on GSM only? (settings, phone, band, change it from auto to gsm) to see if its a 3g network problem?
Click to expand...
Click to collapse
Yeah that's what I mentionned earlier, so far it seems to be okay.
But what could cause this? The device switching between the networks?
I've got it as well, but I have to say I have experienced this on the Wizard also, and that's not a 3g phone. Also had it on the Universal, and that's why I used a Tornado for a year as it didn't occur on the smartphone version of WM5.
I had high hopes of such bugs being ironed out in WM6.
I use the power key to put it in standby, as I didn't want to leave the screen using power whilst it decided to go into standby by itself. Is this extended sleep/standby that I am activating the wrong thing to do? What should we do to get it into a light sleep?
Joe
joebongo said:
I've got it as well, but I have to say I have experienced this on the Wizard also, and that's not a 3g phone. Also had it on the Universal, and that's why I used a Tornado for a year as it didn't occur on the smartphone version of WM5.
I had high hopes of such bugs being ironed out in WM6.
I use the power key to put it in standby, as I didn't want to leave the screen using power whilst it decided to go into standby by itself. Is this extended sleep/standby that I am activating the wrong thing to do? What should we do to get it into a light sleep?
Joe
Click to expand...
Click to collapse
Well I dunno if it's cause by that, but this settings is located in the Power options of the setttings pannel... in the advanced tab you can tell it tu activate it or not and after how long u want it to *turn off the device* (which is what I call gently the "extended power saving")
Just spoke to Orange, apparently the 3G network went down yesterday this coincided with us getting the 3 tytn's so has probably made the problem worse. We were going to send the phone back under the 7 day return policy but have now decided to change them onto the gsm network as suggested by orange and see what happens when the 3G network re-appears.
I had the exact same problem with my Hermes on Orange about 14 months ago - just for a couple of weeks - as they were having network issues on 3g in my area.
3G masts are quite temperamental and if your local 3g provision keeps failing, they will replace them.
I haven't had any repeats of the problems for over a year.
The only annoying things about having to switch down to GSM are 1) no simultaneous data and voice, 2) slower surfing over GPRS and 3) you will get used to the massive battery life increase and switching back will hurt!
unwired4 said:
I had the exact same problem with my Hermes on Orange about 14 months ago - just for a couple of weeks - as they were having network issues on 3g in my area.
3G masts are quite temperamental and if your local 3g provision keeps failing, they will replace them.
I haven't had any repeats of the problems for over a year.
The only annoying things about having to switch down to GSM are 1) no simultaneous data and voice, 2) slower surfing over GPRS and 3) you will get used to the massive battery life increase and switching back will hurt!
Click to expand...
Click to collapse
Just now I had a second round of this problem at work, and I had the same thing yesterday here. Very f***ing frustrating and since the primary function of a phone is to make calls, it's particularly ****e that it doesn't do it well.
No calls and only one out of 6 SMS's were delivered. I had to do a soft reset and then I had two voicemails and 5 unread SMS's pop up.
If the calls/SMS's were retrieved after a soft reset does this mean that it's the phone and not the transmitter? I use my phone for work and this is becoming a real problem.
I can foresee this phone being off to HTC for 'repair' getting a new unit, flogging it and going back to WM smartphone edition.
No - it sounds like a network issue.
Switch to GSM for a week. Then switch back and it should be fine.
unwired4 said:
No - it sounds like a network issue.
Switch to GSM for a week. Then switch back and it should be fine.
Click to expand...
Click to collapse
Yeah, I did some searching on the subject and saw it occurred on many different WM phones, and switched it to GSM only.
It didn't fix it, and it simply wouldn't ring. I checked by calling from a colleague's phone and it displayed: 'warning active call divert on' or something like it.
I was most pissed off, as per my previous post.
When I got home, I activated (via network codes) call divert to my car phone number, then sent the cancel network code to deactivate it.
Tested via home phone and it rang. It was active (screen on) and rang withing one ring on the home phone. So I pressed the power button and tried it. Same result, imperceptibly slower if it was slower.
I work in a pre-fab unit made from corrugated steel on top of a hospital (obviously some sort of rapid office space 'solution'), and whilst I get 2 to 4 bars of 3G in there, and seeing the issues whilst on GSM only, I am totally and utterly confused as to the cause of the problem!
The Kaiser is however, on probation. For now
Cheers,
Joe
joebongo said:
Yeah, I did some searching on the subject and saw it occurred on many different WM phones, and switched it to GSM only.
It didn't fix it, and it simply wouldn't ring. I checked by calling from a colleague's phone and it displayed: 'warning active call divert on' or something like it.
I was most pissed off, as per my previous post.
When I got home, I activated (via network codes) call divert to my car phone number, then sent the cancel network code to deactivate it.
Tested via home phone and it rang. It was active (screen on) and rang withing one ring on the home phone. So I pressed the power button and tried it. Same result, imperceptibly slower if it was slower.
I work in a pre-fab unit made from corrugated steel on top of a hospital (obviously some sort of rapid office space 'solution'), and whilst I get 2 to 4 bars of 3G in there, and seeing the issues whilst on GSM only, I am totally and utterly confused as to the cause of the problem!
The Kaiser is however, on probation. For now
Cheers,
Joe
Click to expand...
Click to collapse
Hmmm really weird! keep us posted on your experiences

3G not working

I'm having major trouble with my phone and need some help.
I've got a standard Vario III no flashed roms etc..
When I'm on standard GPRS network the phone works fine, calls internet etc..
However whenever it switches to a 3G or H network I cant make or receive calls or use the internet. The funny thing is that when it tries to access the internet it looks like it connects but when you click on the 3G (with the arrows) it says there are no sessions active.
Help!!
yes.. i have the same problem too
so we must switch the band using gsm to get phone works normally. if we set AUTO it will failed to make call or to receive call.
another kaiser from my friend was normally in same area. please help us.. thanks
maybe I have the same problem, I can't make calls, when I make a call it do a sound alert and end the communication.
The line is ok, I was using it with other phone without problems. I spend today 5 hours with the mobile service provider (CLARO ARGENTINA) tech service and they finally say this must be a problem with the pda, not with the service (after testing all possible alternatives)
The phone is almost new! I can connect to EDGE and navigate the internet, H or 3G appear "some times" but it get EDGE 99% of the time.
When somebody call me the phone ring and then then lost connection. When people call me they receive a "network error".
1 of 20 times I CAN do a call.
Do you think is the phone? or there is some update ? I'm downloading a 6.1 rom to test with it.
it is not the phone. Assuming your are using T-Mobile, Edge network coverage is almost 100% complete, while T-Mobile's 3G network is in the early stages. So you will usually get Edge until 3G is nearing completion - T-Mobile is slow
Here is an article: http://www.boygeniusreport.com/2008/05/05/t-mobiles-3g-rollout/
Well I use Claro AR (in Argentina). EDGE is 100% and 3G is quite well in my city, but what do you think about my phone calls are closed after 5/6 seconds with error and then it lose phone coverage. Never happened with other phone, same provider, same line, other phone.
Now I have updated to a duttys Rom with a newer radio version (1.65.x, my phone comes with 1.21.x) and still happening. Now I will test another rom
It IS the phone.
If you do a search on this board lots of people are having that problem, as I found when encountering it myself. It's a hardware fault in the radio part, that requires sending the device back to HTC. They actually replace the whole mainboard to cure it, so it's a serious issue.
Awaiting to receive mine back, it's been there for a month now
Here's a large thread about it: http://forum.xda-developers.com/showthread.php?t=335074
thank you
I force the phone to run under GSM network (not WCDMA) and the phone works perfect, internet too (only EDGE). But I can't use 3G because if I set it to WCDMA or AUTO in the phone network section, it's unusable.
That's the one. I'm receiving my Kaiser back from repair tomorrow, can't wait, and hope it will be fine this time... It's been at the service center for 6 weeks now
hello, any news ?
Yep, received it back like 3 weeks ago, everything works flawlessly. They replaced the whole mainboard just like for the other people with the same issue.
Ok I'm dead. Sending the devide to north america from Argentina? now way.
Why? I had to send it to the UK, not much of a problem...
and it back again to you? awesome!! not easy in latin america!
Ok I will call tomorrow the seller to ask the guarantee. let's see what happen.

phone calls on a particular. network sends phone. to emergency mode

Hi guys
So i noticed that when i am on TIM italy... And i am in roaming from o2uk, well after i either do a phone call or i receive one the phone goes to emergency calls only for like a minute or so which is a bit odd.
Called o2 they just said fo change network im roaming on.. My wifes samsung s5 is on Same network and does not fall when doing a call.
What could. It be?? Just odd. If i choose another network works fine but i like TIM..
Thanks

Can make phone calls only on 2g.

Hey guys, i'll start off by saying this is my first post, so go easy on me.
I'm currently running the oxygen OS pie beta 2 on my Oneplus 3T.
A couple of months ago, I had this weird problem pop up. People suddenly couldn't call me. And when I made calls, they say they can't hear me clearly at first and then after about 15 seconds, they can't hear me at all. The surprising thing is, I can hear them clearly on my side. I tried searching for solutions to fix microphone problems but that wasn't it. I thought it was SIM card problem and changed my sim. But the problem persisted. Then I wen't on to change to another carrier, which didn't solve the problem as well. I tried flashing havocOS thinking it might be a problem with oxygenOS, but still, same problem. By now I already know that it's a problem with the phone.
And then I tried switching the network to 2g only and viola. I could make and receive calls. However, data is super slow on EDGE (as expected). So after some time, I tried using 2g/3g automatic as the network setting (hoping the problem would have miraculously gone away). This time, the phone still couldn't make calls but it also got really hot. Sometimes to the point where it's too hot to touch the phone for long (no joke). So I immediately switched back to 2g only. I also tried 2g/3g/4g automatic and this allows me to connect to lte and the phone doesn't get hot but since my carrier has no VoLTE, I still can't make calls as the phone has to drop to 3g for calls. The phone takes a really long time to drop down to 3g and when it does, the calls still don't work and the phone gets hot.
So now i'm stuck on 2g only because I need to make and receive calls but data is just too slow to use. I hope I've given enough information. Any solutions?
Don't have a solution, but just a couple thoughts (shots in the dark, really):
1) What country are you located/what carrier do you use?
2) Does turning WiFi off make any difference? May not make a difference on this device, but I vaguely remember a while back someone having a problem with another device (and maybe a carrier specific issue) not dropping down to 2G for voice calls, and I think it only happened when WiFi was on.
redpoint73 said:
Don't have a solution, but just a couple thoughts (shots in the dark, really):
1) What country are you located/what carrier do you use?
2) Does turning WiFi off make any difference? May not make a difference on this device, but I vaguely remember a while back someone having a problem with another device (and maybe a carrier specific issue) not dropping down to 2G for voice calls, and I think it only happened when WiFi was on.
Click to expand...
Click to collapse
I'm from Malaysia and i'm pretty sure it's not a carrier problem. My sim works on my friends phone perfectly.
Nope, wifi didn't make a differene unfortunately.

Question Big issue, No Data during a call.

So One thing I discovered on this new phone of mine is that although working perfectly there is a major flaw in the way Internet data works during a phone call.
Any time you make a call, the phone downgrades the active signal from 5G/4G to H or E ( GSM).
Which in turns cuts off the data.
If I force 5G or 4G, then the phone call cannot be made. It just disconnects.
I have tried all settings, Volte enable/disable with no joy.
Some have said it's a carrier limitation, but it's not, cause in my iPhone, the very same simcard works just fine and the Internet is usable during a call.
Also tried with dual Simcard setup. As in the settings, the phone allows to use one simcard for data and one for call. Still not working.
Can someone please tell me if there is a solution please, or can you try your phone while on the call to see if Internet works as this feature is detrimental to me keeping the phone. If this doesn't work I will be selling the phone and getting a realme replacement.. Xiaomis sometimes suck with their non existent support.
Thanks
Evo400 said:
So One thing I discovered on this new phone of mine is that although working perfectly there is a major flaw in the way Internet data works during a phone call.
Any time you make a call, the phone downgrades the active signal from 5G/4G to H or E ( GSM).
Which in turns cuts off the data.
If I force 5G or 4G, then the phone call cannot be made. It just disconnects.
I have tried all settings, Volte enable/disable with no joy.
Some have said it's a carrier limitation, but it's not, cause in my iPhone, the very same simcard works just fine and the Internet is usable during a call.
Also tried with dual Simcard setup. As in the settings, the phone allows to use one simcard for data and one for call. Still not working.
Can someone please tell me if there is a solution please, or can you try your phone while on the call to see if Internet works as this feature is detrimental to me keeping the phone. If this doesn't work I will be selling the phone and getting a realme replacement.. Xiaomis sometimes suck with their non existent support.
Thanks
Click to expand...
Click to collapse
This comes from the operator who has not yet communicated with Xiaomi.
Same case with 2 operators on the same phone.
What version of rom?
NOSS8 said:
This comes from the operator who has not yet communicated with Xiaomi.
Same case with 2 operators on the same phone.
What version of rom?
Click to expand...
Click to collapse
Global ROM 13.0.4
I can't see an operator fault if they have Volte services enabled and this simcard works flawlessly on other android systems.
As a matter of fact, any SimCard i have tried, so far 3 providers and the phone does the same thing. As soonest the call is made it downgrades the signal to H while full 5G or 4G is available??
Evo400 said:
Global ROM 13.0.4
I can't see an operator fault if they have Volte services enabled and this simcard works flawlessly on other android systems.
As a matter of fact, any SimCard i have tried, so far 3 providers and the phone does the same thing. As soonest the call is made it downgrades the signal to H while full 5G or 4G is available??
Click to expand...
Click to collapse
the operator must provide the necessary information for each brand and phone to activate Volte and Wowifi.
On my 11t pro everything works with SFR and nothing with FREE because Free has not yet transmitted the information necessary to activate the services.
So went to see the operator. They sell Xiaomi phones. 3 network ( Three EU)
The phones in the stores are working just fine, no issues at all. And my phone simply just isnt.I have tried every possible setting and still not working.
See the screenshot below. As I'm typing this I'm on a super fast full signal 5G connection. As soon as I make a phone call, the phone will downgrade to E or H+ which is horrible. This network signal switching is also laggy, and If 2g signal is poor I cannot even make a call.
Evo400 said:
So went to see the operator. They sell Xiaomi phones. 3 network ( Three EU)
The phones in the stores are working just fine, no issues at all. And my phone simply just isnt.I have tried every possible setting and still not working.
See the screenshot below. As I'm typing this I'm on a super fast full signal 5G connection. As soon as I make a phone call, the phone will downgrade to E or H+ which is horrible. This network signal switching is also laggy, and If 2g signal is poor I cannot even make a call.
Click to expand...
Click to collapse
Does the "Use VoLTE" switch appear in the SIM card settings?
If not you can try the Dialer Code *#*#869434#*#*. That only will make this switch appear, but sometimes this is enough. It should also show the little VoLTE-Badge next to the signal strength (see screenshot).
Deleted
I just had another look and on your 1st post it says the SIM is named "3 IRL", as far as I know Three Ireland does not offer VoLTE at all.
So it will always drop to 3G/H+ or 2G/E ... on every phone.
mici01 said:
I just had another look and on your 1st post it says the SIM is named "3 IRL", as far as I know Three Ireland does not offer VoLTE at all.
So it will always drop to 3G/H+ or 2G/E ... on every phone.
Click to expand...
Click to collapse
5G connection should support this naturally. If I put this simcard Into an iPhone or Galaxy the 5G connection stays on regardless.
Anyway even with Vodafone this doesn't work,so I'm thinking it either a phone limitation or a phone is fooked
Evo400 said:
5G connection should support this naturally. If I put this simcard Into an iPhone or Galaxy the 5G connection stays on regardless.
Anyway even with Vodafone this doesn't work,so I'm thinking it either a phone limitation or a phone is fooked
Click to expand...
Click to collapse
No, for VoNR your phone still needs the same configs as with VoLTE. Though only a few operators support VoNR as of now.

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