Outgoing calls drop to 4G. Incoming calls stays in LTE - T-Mobile Samsung Galaxy S8 Questions & Answers

In addition to dropping from LTE to 4G during an OUTGOING call, when I go into the phone app - settings - more settings - phone drops to 4G also. T-Mobile has escalated this to higher level technicians today, so I am waiting to see what they come up with. We replaced my SIM at the store today, I got an update from TMO last night, and nothing has fixed it. Tried the *#2263# and clearing bands and re-selecting all LTE. Still not working. The iphones on my account hold LTE during a call, so why not this new S8+? Any suggestions for me please?

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Q: Simultaneous Data and Voice on T-mobile HTC one

HI everyone --- just picked up my phone tonight from tmobile. however, the data drops every time i'm on a call. no 2g, 3g, or 4g indicator after about 10 seconds of initiating a call.
just trying to figure out if i have a bad phone or if others are also noticing this issue.
any feedback is much appreciated. I may switch to At&t and get the optimus g pro if this is "feature" of the HTC one
biswasd said:
HI everyone --- just picked up my phone tonight from tmobile. however, the data drops every time i'm on a call. no 2g, 3g, or 4g indicator after about 10 seconds of initiating a call.
just trying to figure out if i have a bad phone or if others are also noticing this issue.
any feedback is much appreciated. I may switch to At&t and get the optimus g pro if this is "feature" of the HTC one
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Click to collapse
If you're on EDGE it can only do one at a time not both.
SmiLey497 said:
If you're on EDGE it can only do one at a time not both.
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Click to collapse
Correct. Not on 2G yes on 4G.
SmiLey497 said:
If you're on EDGE it can only do one at a time not both.
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Click to collapse
I hear ya....but it's happening from 4g to zero; 3g to zero....the data connection (regardless if it's locked onto 4g or not), just drops after a few seconds of being on the call.....
what does everyone have their data settings set to? under mobile data > network mode.....
mine was originally set to GSM/WCDMA/LTE auto....
I changed it to GSM/WCDMA AUTO since tmobile doesnt' have LTE where I live to save battery......
but the problem persists with all settings, even when I select teh LTE....
any thoguhts?
mine was originally set to GSM/WCDMA/LTE auto....
I changed it to GSM/WCDMA AUTO since tmobile doesnt' have LTE where I live to save battery......
but the problem persists with all settings, even when I select teh LTE....
any thoguhts?
Click to expand...
Click to collapse
Dial *#*#4636#*#* select phone info and see if it's set to GSM/WCDMA/LTE there as well.
I had that problem. Mine was set to CDMA/EvDo/GSM/WCDMA/LTE auto from factory. I did the above and set it to GSM/WCDMA/LTE auto and it fixed it for me.
Tidbits said:
I had that problem. Mine was set to CDMA/EvDo/GSM/WCDMA/LTE auto from factory. I did the above and set it to GSM/WCDMA/LTE auto and it fixed it for me.
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Click to collapse
where exactly is this setting? i entered *#*#4636#*#* and clicked on the three little dots in teh upper right hand corner....then i selected "select radio band".
A window popped up with "automatic" or "usa band". I selected "automatic".....but i don't see anywhere to select between GSM / LTE, etc. within this phone settings hidden menu..
help!
****Edit:***** never mind i found it however, mine was set by default to WCDMA......should I change it?
biswasd said:
where exactly is this setting? i entered *#*#4636#*#* and clicked on the three little dots in teh upper right hand corner....then i selected "select radio band".
A window popped up with "automatic" or "usa band". I selected "automatic".....but i don't see anywhere to select between GSM / LTE, etc. within this phone settings hidden menu..
help!
****Edit:***** never mind i found it however, mine was set by default to WCDMA......should I change it?
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Click to collapse
yes should be set to GSM/WCDMA/LTE auto or if you don't have LTE in your are just GSM/WCDMA auto.
Tidbits said:
yes should be set to GSM/WCDMA/LTE auto or if you don't have LTE in your are just GSM/WCDMA auto.
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got it....THANK YOU TO EVERYONE for their replies....changed it now...but still -105dBm to -93dBm at best......
what's funny is that my work provided tmobile blackberry sitting right next to my HTC one has awesome signal right now.....i don't get it.....although the blackberry is a 3g blackberry at best with no 4g capability.
also, i have noticed that if i switch the ONE to GSM only, the signal jumps to -71dbm.....!!! so apparently the "4g" sucks here in northern cincinnati....
4G have low coverage in all countrys, only usa have widely 4G.
If you got 4G that means you got better internet speed not stronger signal.
Signal depends on internal antena which dosent care if signal is 2g,3g,4g.
Sent from my LT26i using xda app-developers app
Simultaneous Voice and Data HTC One on T-Mobile
After dialing *#4636#*#* my HTC One on T-Mobile is set to WCDMA preferred as we do not have LTE coverage yet.
Voice and Data works superfluously under "4G" HSPA+ 21. I tested both while making incoming and outgoing calls.
I was told to change it to GSM/WCDMA/LTE auto when they put LTE live in my area.
erg208 said:
After dialing *#4636#*#* my HTC One on T-Mobile is set to WCDMA preferred as we do not have LTE coverage yet.
Voice and Data works superfluously under "4G" HSPA+ 21. I tested both while making incoming and outgoing calls.
I was told to change it to GSM/WCDMA/LTE auto when they put LTE live in my area.
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Hi there erg208, I've tried all of those settings and still no success. Only for a very short time (data will stay on anywhere from 3 seconds into the call to no more than 10 mins into the call....last night was a record with 30 mins into the call) but the moment I begin to do to much surfing or send one too many emails or Gtalk for too long it's like my phone just gives up and the data disconnects and at no point during my phn call will it ever reconnect. I have to hang up my call and INSTANTLY the data turns on with all 5 bars and an H signal. AND most times I have to restart the phn before I can get simultaneous voice and data again. Do u have this issue? May I please ask if you've done an extensive test with your simultaneous voice and data? Meaning have u actually been on a long enough call and seriously surfed the web, sent & received multiple emails, chatted on Gtalk and sent an MMS all during one call and it stay connected? That would be a real test b/c mine doesn't. And if your data does disconnect do u have to hang up the call for it to come back on?? And does it work again if you make another phone call without having to restart your phone? No matter what, having to do either of those things is unacceptable b/c I have NEVER had to with any of my previous HTC devices on Tmobile's network. And I'm a flight attendant so I'm all over this country receiving 3G, 4G and LTE signals and it does it no matter where I am, if I'm moving in a car or sitting perfectly still in the same area with good coverage. Pls let me know your full experience in testing this. I really appreciate your help! Thanks
---------- Post added at 03:41 AM ---------- Previous post was at 02:51 AM ----------
biswasd said:
got it....THANK YOU TO EVERYONE for their replies....changed it now...but still -105dBm to -93dBm at best......
what's funny is that my work provided tmobile blackberry sitting right next to my HTC one has awesome signal right now.....i don't get it.....although the blackberry is a 3g blackberry at best with no 4g capability.
also, i have noticed that if i switch the ONE to GSM only, the signal jumps to -71dbm.....!!! so apparently the "4g" sucks here in northern cincinnati....
Click to expand...
Click to collapse
Hi there biswasd, I've tried all of those settings and still no success. Only for a very short time (data will stay on anywhere from 3 seconds into the call to no more than 10 mins into the call....last night was a record with 30 mins into the call) but the moment I begin to do to much surfing or send one too many emails or Gtalk for too long it's like my phone just gives up and the data disconnects and at no point during my phn call will it ever reconnect. I have to hang up my call and INSTANTLY the data turns on with all 5 bars and an H signal. AND most times I have to restart the phn before I can get simultaneous voice and data again. Do u have this issue? May I please ask if you've done an extensive test with your simultaneous voice and data? Meaning have u actually been on a long enough call and seriously surfed the web, sent & received multiple emails, chatted on Gtalk and sent an MMS all during one call and it stay connected? That would be a real test b/c mine doesn't. And if your data does disconnect do u have to hang up the call for it to come back on?? And does it work again if you make another phone call without having to restart your phone? No matter what, having to do either of those things is unacceptable b/c I have NEVER had to with any of my previous HTC devices on Tmobile's network. And I'm a flight attendant so I'm all over this country receiving 3G, 4G and LTE signals and it does it no matter where I am, if I'm moving in a car or sitting perfectly still in the same area with good coverage. Pls let me know your full experience in testing this. I really appreciate your help! Thanks
electrash said:
4G have low coverage in all countrys, only usa have widely 4G.
If you got 4G that means you got better internet speed not stronger signal.
Signal depends on internal antena which dosent care if signal is 2g,3g,4g.
Sent from my LT26i using xda app-developers app
Click to expand...
Click to collapse
That is not true. We have decent LTE coverage here in UAE (inside the cities at least) and great 3G coverage even on highways.
I did have a similar issue that while on 4G data would drop if i receive a call but that's because 4G LTE does not support voice and my call gets "demoted" to GSM which does not support data+voice simultaneously.

Accepting calls when in 4G mode

I'm having some issues receiving phone calls when I'm in 4G mode - I'm aware of the fact that voice over lte doesn't work yet, however in my understanding the phone should quickly switch to 3g mode and accept the incoming call, right?
Apparently my P7-L10 has trouble with that. It just doesn't switch, and the incoming call goes to voicemail.
Is that normal? Is there any fix to make the device switch to 3g mode quicker upon a call?
Running B135 rom, rooted.
GawDroid said:
I'm having some issues receiving phone calls when I'm in 4G mode - I'm aware of the fact that voice over lte doesn't work yet, however in my understanding the phone should quickly switch to 3g mode and accept the incoming call, right?
Apparently my P7-L10 has trouble with that. It just doesn't switch, and the incoming call goes to voicemail.
Is that normal? Is there any fix to make the device switch to 3g mode quicker upon a call?
Running B135 rom, rooted.
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Click to collapse
I'm having fine calls when I'm on 4G. (Milan, north Italy). Perhaps your city has too few 4G antennas and doesn't have stable 4G signal so it switches back and forth to 3G while you're having a call?
vEEGAZ said:
I'm having fine calls when I'm on 4G. (Milan, north Italy). Perhaps your city has too few 4G antennas and doesn't have stable 4G signal so it switches back and forth to 3G while you're having a call?
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Click to collapse
I don't think that's the issue, 4G coverage here is pretty amazing.
GawDroid said:
I don't think that's the issue, 4G coverage here is pretty amazing.
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Click to collapse
Forget what I wrote, I forgot that voice calls don't have to do anything with LTE, lol.
Anyway I'm having fine calls with 3G or 2G, have you tried doing a nandroid backup and start over to see if the problem occurs also in fresh state?
Fine calls with 3g or 2g here as well.
Except when I'm on 4G - nobody can reach me, it all goes to voicemail...
I could say I started fresh - I did a factory reset and a clean wipe 3 days ago, but I haven't noticed the issue untill yesterday.
On a French, people reported issues with calls in 4g covered area, but it seems that the problems come from network, not from the phone. The issues appear only in certain areas with one operator, and some other phones behave in same manner. Perhaps you need to check with another SIM card from another operator.
hello,
I encounter the same problem receiving my incoming calls in automatic mode 4G 3G 2G redirected my mail. When I'm on automatic 3G2G no problem.
I'm B133 update. 4 months no problem. Since mid-October the problem occurred.
My operator is Virgin Mobile. P7 smartphones, antennas or operator?
The rocker 4G 3G to receive calls no longer made. Tried my sim card on a S5 and a LG G2 and the problem is the same.
After several calls to my operator solution but not another concern, I have to connect data to receive my calls 4G 3G 2G automatic.
I'll try to go B121 update or réinisilisation P7.
If no solution change operator before trying their sim card lent by friends subscribers home.
Translated by Google. French to English.
@@+++++++
Reg

cant receive and make calls when connected to LTE

I just bought my note 5. Its the dual sim version. So the first few days was days.... i started having difficulty with making outgoing calls... texts are fine... its like 1 out 10 calls would push through. So i rebooted my phone thinking that it might resolve the issue....unfortunately it did not. Then a few friends sent me a message that theyve been trying to call me and it always says im out of coverage are... the whole time this was happening I was connected to LTE. When i changed my mobile network setting to 3g/2g .... then calls came in and went out. Has anyone have the same issue with note 5?
The international versions don't have VoLTE enabled. Not sure how to enable it. Mine also doesn't have WB-AMR (HD Voice) enabled either.
Thus, calls need to be switched through the HSPA network and can't be routed while connected to LTE. Essentially when making a call your phone switches and tries to register on HSPA, quickly.

Signal drop upon placing call - XT1095 on H2O

I recently changed to H2O, which is an AT&T reseller for those who are unfamiliar, and I'm having a very peculiar problem.
When I go to make a call, as soon as I tap the green button to make the call, sometimes my signal drops to 0 bars and I can't make the call. Sometimes this happens repeatedly and it's impossible to call anyone. But sometimes the call will go through after the 2nd, 3rd, or 4th try. However, sometimes it drops to emergency calls only after the call fails, or sometimes it drops to no service.
Additionally, when I go to change the conditional call forwarding under dialer - settings - calls - call forwarding, as soon as I tap call forwarding, the signal bars vanish and I get a call settings error. This happens almost all of the time. And again, sometimes it will drop to emergency calls only, or a several times I've had it drop to no service.
When I give up trying to make a call or change call forwarding settings, the signal strength will return after a minute or so, which is currently fluxuating around -112 dBm 28 asu, -116 dBm 24 asu, 110 dBm 30 asu. Not sure what any of that means though.
Frequently, incoming calls do not reach my phone. Often I'll get a text message asking me why I'm not answering my phone, but it never rang. There's no indication that my phone was out of service as there is always at least one bar.
I can send text messages with no problem at all. My data also works just fine. In fact, one of my friends gave up calling my phone number and instead calls me on WhatsApp because that's the only way he can get a hold of me. He would call my number, have it fail, and then immediately call me on WhatsApp and that goes through because my data doesn't usually have any issues.
I've tried changing APN settings according to different information I got from H2O. I've tried changing the preferred network type to 3G and 2G. Changing to 2G seems to help my ability to make calls, or maybe it just seemed that way. I've contacted H2O numerous times about it. They opened multiple tickets on it and finally said that there's no problem on their end getting service on that sim card. I sorta verified this because the sim card doesn't display this problem in my 1st gen Moto X, an XT1053.
Two other people in my house are on the AT&T network, one on Cricket with a Galaxy S6 (G920AZ), and one on H2O with a Galaxy S3 (T999) and they never have any issues here at home or elsewhere.
My phone is an XT1095 pure edition. I run stock 6.0, 24.11.18.victara_tmo.tmo.en.US, kernel 3.4.42-g389e46b, rooted, TWRP, with no apps that modify call behavior except Google Voice which is set to never use GV to make calls. This phone worked flawlessly on several different T-Mobile resellers. I'm about to switch back to another T-Mobile reseller but I thought I'd post here about this strange issue first because I don't want to always be limited to the T-Mobile network.
Any advice or input is greatly appreciated.

US T-Mobile, random calls go straight to voicemail.

I am getting calls that go straight to voicemail. This does not happen all the time, but when it does there is no call log, just a voicemail notification. Searching the web and support calls to T-Mobile seems to indicate that it is because the Mate 20 Lite does not support VoLTE, even though the phone has the band support. When a call comes in, T-Mobile will try and drop the call from LTE to 2G/3G, fail and then send the call straight to VM. Cannot find a solution and it seems there are many people having this issue across many different brands of unlocked phones on the T-Mobile network.
Here is the odd part and why I think it might be the phone. I am getting insane battery life on the Mate 20 Lite. I charged the phone to 100%last night, went to bed and 8 hours later it was still at 100%. Last night I missed an important call that went straight to VM. No forwarders, call blocks, airplane mode etc. I also noticed that these straight to VM calls happen when the phone has been sitting/immobile for a while. Like the aggressive battery management is killing some service. This does not happen with a Xiaomi A2 that my wife is using.
BTW, I am connecting to band LTE band 4 and get near 40Mbps down when testing, so I assume I am getting 4G LTE.
The phone is still within the return window and if I cannot solve this, I have to send it back.
Anyone have a solution?
No solution. I have a similar problem where I live there is nearly no cellular reception and the only way to get calls is to be connected to WiFi which activates VoLTE / Voice over WIFI. Huawei Mate 20 Lite does not do it though. Why not?

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