Phone Calls Randomly Disconnecting - OnePlus 3T Questions & Answers

Hey!
Ever since I've gotten my OnePlus 3T, I get lot's of network related problems. Sometimes when I call someone, the other person can't hear me while I can hear him/her. Sometimes I don't hear them at all and have no idea if they can hear me. Other times, the call will simply stop without any notice on my end. On my girlfriend's iPhone, it says "Call Failed." This can happen with anyone, so it's not an issue on their end.
I am running OOS Beta 9 but it happens on Stock as well.
I am on Videotron Network.
Is it possible that the phone is not compatible with this network? I can't RMA this phone because apparently a tiny scratch on it voided the warranty(??????).

As long as your phone is the A3000 model American networks except for CDMA should work. The A3003 and A3010 however are designed for the rest of the world and will not work 100% in America due to missing bands. And no, there doesn't seem to be possible to unlock the bands due to encrypted and locked data files in the modem data partition, if you got the wrong model, just sell it and get the A3000.

Sometimes I have the problem that people call me but they just hear "The called person isn't available right now..." . I don't know if the carrier is the problem or the phone. (My carrier said it's possible my phone switches networks and the call gets rejected but I don't think that's always the problem because it happens too often).

I do have the A3000 version. Should I contact my network provider? Or should I unlock my bootloader and flash a ROM non OOS based to see if it's a software issue?

Haidary.T said:
I do have the A3000 version. Should I contact my network provider? Or should I unlock my bootloader and flash a ROM non OOS based to see if it's a software issue?
Click to expand...
Click to collapse
Yeah, u should contact ur network provider & ask OnePlus about this network issue. If they still cannot troubleshoot the problem, then try to DOWNGRADE OOS Version. After that, if u still didn't get any solution, as the final resort,
Unlock ur Bootloader & start Flashing LOS based custom roms! (or what ever ROM u preferred)
Sent from my OnePlus 3T using XDA Labs

Try going into phone Settings, SIM and Network, and force 2G or 2G/3G, and see if that helps. I'm wondering if maybe your carrier is using Voice over LTE (VoLTE) that maybe isn't playing well with the 3T?
GSM (2G) phone calls should be bone simple, in that you don't need to unlock any bands or have the right model number. Most every carrier in the world uses 1 or 2 of the same GMS bands 850/900/1800/1900 (exception CDMA carrier as mentioned, and Videotron doesn't look to be one of those).
Downgrading to another OOS version is a good idea also, as this I believe should write a different modem to the phone, which might be the problem.

Related

Issue with At&t unlocked Moto X 2014. on t-mobile

So i am having issue. I bought a Moto X 2014 and it is clean in terms of imei. Both t-mobile says its clean and at&t says its clean. It is a AT&T variant XT1097 and like i said it is clean in terms of imei. weirdly enough T-mobile wont be picked up on the service, but AT&T will? it basically says
No Service
selected network (T-mobile) unavailable
and when i do try to select a network it says
"cant connect to network right try again later"
has anyone else have this issue with the AT&T moto trying to use it on at&t? and found a solution? if there is any solution ill take it i need all the help i can get lol
i tried reseting it, factory reseting, airplane mode, etc literally almost everything else.
Sorry.....I have similar issue..Did you find the solution? If yes could you share the info for it.
sksearch said:
Sorry.....I have similar issue..Did you find the solution? If yes could you share the info for it.
Click to expand...
Click to collapse
Add the T-Mobile APN.
it's discussed on the ATT thread, basically it's an issue with the lollipop radio used on our update, "fix" is here: http://forum.xda-developers.com/moto-x-2014/general/att-xt1097-lollipop-discussion-t2951294/page36
Add the APN (as mentioned above)
Download the 4G/LTE switcher app
select WCDMA preferred as network, only HSDPA speeds but it's better than no service ^_^
I had this similar issue and it was driving me absolutely insane, the connection would be weak then it would just disconnect me altogether and then zero service. Most of the time if I were to get a call the radio would switch to HSPAP like normal then after the call it would fail to switch back to LTE then it would just completely drop connection. This is on an unlocked AT&T XT1097 running on the unlimited MetroPCS (T-Mobile) mind you.
Since February 2015 I've been dealing with this bug by using LTE switch to get by, but this got so tedious and it just irked me that I had to go thru all this crap because of poor development. This is a pretty huge bug that should've never been there to begin with. Seriously, how dare you mess with my service Google?
Anyways what I did to fix this completely was just purchase MoFoRoot for $20 (fully worth BTW) and flash the 4.4.4 AT&T modem and now I have zero issues. I used to not connect to the network on a reboot but since flashing the modem I am now able to connect and stay connected without any hassle. The connection is now solid and I can't be happier with this phone. Currently on stock 5.0.2 non-rooted with 4.4.4 modem and zero problems, now I don't need to get another phone.
Using the fast.metropcs.com APN as the T-Mobile APN doesn't allow me to connect. I have solid LTE and HSPA/HSPAP service with it and can't be happier... I take that back, I'd be happier with better indoor coverage.
Thank you makers of MoFoRoot for your lifesaver app, I am happy to have supported your fine work.

Can't receive calls in 4G LTE but fine on GSM

SM-N9208
Android 7.0
Baseband version: N9208ZTU4CQH2
This phone was bought abroad in Taiwan and I'm now using it in US with metropcs. It was working fine for the last year or so and I think it broke in 7.0. I tried reverting back to 6.0.1 but still same issue so I'm guessing something must have changed.
When it is on 4G/LTE. I can receive text, data and it works fine. But it takes like 1-2 minutes to make a call out. I can't receive any calls on 4G/LTE. Receiving calls only works on GSM mode.
I did a factory reset and also kies recovery. I also tried it without restoring any apps so it is completely fresh.
If it's an international version it won't be programmed correctly for wifi calling / volte in the US no matter what you do. I ran into that same issue with my N920i and wificalling/volte/carrieraggregation. Not that I could use wifi/volte because at&t prepaid, but still.
BlockOfDynamite said:
If it's an international version it won't be programmed correctly for wifi calling / volte in the US no matter what you do. I ran into that same issue with my N920i and wificalling/volte/carrieraggregation. Not that I could use wifi/volte because at&t prepaid, but still.
Click to expand...
Click to collapse
It did work for about a year with 4G /LTE.. Either something has changed with the carrier or that an update broke the phone. I assume using a different radio firmware would not work as well? Note 5 is old but note 8 is really expensive and I don't want to shell out so much. Might be time to use google voice and redirect all the calls if I can't get this to work.

Cellular strength and throughput

We know how much you like to stream, ahem, "videos", and so cellular data is mega-important. Rate this thread to express how you think the Xiaomi Mi Max 3's LTE performs. A higher rating indicates that it's fantastic: throughput is excellent and signal strength is top-notch.
Then, drop a comment if you have anything to add.
Not so good, my first day out of the house with the phone and it dropped T-Mobile service twice while I was on a call.
ice0901 said:
Not so good, my first day out of the house with the phone and it dropped T-Mobile service twice while I was on a call.
Click to expand...
Click to collapse
If you like you can use Network Signal Guru and measure and take screenshots and post here to give some actual data if its good or bad.
Which bands are used when and how long and when a call cuts out.
And when its very good to give a comparison when the phone performs very well and when not so good.
However Network Signal Guru requires root permissions
https://play.google.com/store/apps/details?id=com.qtrun.QuickTest
Some alternative apps are
CellMapper
https://play.google.com/store/apps/details?id=cellmapper.net.cellmapper
Network Cell Info Lite
https://play.google.com/store/apps/details?id=com.wilysis.cellinfolite
SignalCheck Pro
https://play.google.com/store/apps/details?id=com.blueline.signalcheck
I don't have root yet however I do have the so called global firmware. Maybe that's the source if it is indeed a fake ROM.
So I just noticed something. When I make/receive a call I immediately drop LTE. Once the call ends it's restored. I have to assume the phone is not capable of voice over LTE or I need to find a toggle.
ice0901 said:
So I just noticed something. When I make/receive a call I immediately drop LTE. Once the call ends it's restored. I have to assume the phone is not capable of voice over LTE or I need to find a toggle.
Click to expand...
Click to collapse
that is normal....all phones switch to 3g when on call (even U.S carrier phones)...unless doing VOLTE...then mobile data unvailable during call ...Samsung S8 does it on Verizon (so does Iphone 7)
mac231us said:
that is normal....all phones switch to 3g when on call (even U.S carrier phones)...unless doing VOLTE...then mobile data unvailable during call ...Samsung S8 does it on Verizon (so does Iphone 7)
Click to expand...
Click to collapse
I know as I stated in the original post the phone must not be compatible with Volte as there is no toggle. Additionally it's dropping to edge instead of 3G whenever I receive a call
---sorry wrong info-not verified
I am on AT&T and have been hoping you posted an update to your initial findings.
So text,calls are working as intended now ?
Appreciate the info so far.
mac231us said:
anyone having issues with simply making calls, sending sms and accessing the internet? anything in the *#*#64663*#* phone service mode - phone seems to want to always sit in TD-SCDMA/LTE mode instead of LTE/UMTS mode. Always reverts to it. Not sure if that is the issue. HORRIBLE experience with this device so far. Right off the bat when I got it, it was doing sms sending (forever in sending mode until failed or sms would come in after like 15-20 mins and only after a reboot) Incoming sms no issues. Message center is ok. Then data was an issue. Switching SIM seemed to fix one first call then the 2nd call would just sit in dialing mode forever and ultimately hang up. Garbage device (so far) unless it is some simple fix. This is on ATT.
EDIT finally managed to fix the issues
fastboot mode
erase cacne this went through
erase data did not work
then did factory reset through the recovery mode
booted it up
inserted sim...everything works now (for the first time)
bootloader was unlocked by the vendor/someone upstream prior to shipping
very fast...even on 4g
lte comes on selectively so far only seen band 5 (no band 4)
EDIT2
So while mui is pretty slick and the phone is easy to use, fast, great on battery it still suffers from a Xiaomi-related bug (will call it that) in call-forwarding. You cannot set call forwarding (of if previously set - when the sim is in another device, of course), the call forwarding cannot be disabled (SIM error) This has been an issue for years - yes like since 2014-15...since the user base is mostly overseas, you can see complaints but no real resolution (useless feedback from thread owners etc who talk about contacting the operator, removing sim card etc) This does not exist on Huawei, Oppo etc phones (having used them) Even some miui ports suffer from this on other devices (so it seems very likely an MIUI issue) I have an old Samsung Mega that has the same issue on a ported MIUI for it. The Mi Mix I had a few months back had the same issue. No one ever fixes this.
Click to expand...
Click to collapse
I dont understand the steps that you did to fix the problems.
Could you please make it more clear and tell us exactly the commands you did in fastboot mode / not in fastboot mode and give us clear instructions? like I dont understand "erase cacne this went through
erase data did not work"
Thanks bro and Im happy that the problem is solved for you.
omer919 said:
I dont understand the steps that you did to fix the problems.
Could you please make it more clear and tell us exactly the commands you did in fastboot mode / not in fastboot mode and give us clear instructions? like I dont understand "erase cacne this went through
erase data did not work"
Thanks bro and Im happy that the problem is solved for you.
Click to expand...
Click to collapse
not verified info deleted my post (need to check)
mac231us said:
not verified info deleted my post (need to check)
Click to expand...
Click to collapse
got any issues with the phone ?
omer919 said:
got any issues with the phone ?
Click to expand...
Click to collapse
No...I think there was no issue. I was doing something wrong in selecting bands that don't exist here through the service menu-so am all confused apologize for posting off and on and then posting a 'solution' for something that probably never existed. I see my post was quoted-hopefully it does not mislead and start a plethora of unnecessary questions-you may want to edit what you quoted from my initial post-just a suggestion thanks
quazimojo said:
I am on AT&T and have been hoping you posted an update to your initial findings.
So text,calls are working as intended now ?
Appreciate the info so far.
Click to expand...
Click to collapse
Everything is fine except Calls. I've been told my phone rings once then goes to voicemail and occasionally I will connect to another party but we can't hear each other. Phone calls work less than 2 out of 5 times. Text is flawless, data works great with the exception of slow handover when switching from wifi to LTE.
ice0901 said:
Everything is fine except Calls. I've been told my phone rings once then goes to voicemail and occasionally I will connect to another party but we can't hear each other. Phone calls work less than 2 out of 5 times. Text is flawless, data works great with the exception of slow handover when switching from wifi to LTE.
Click to expand...
Click to collapse
And you are on T-mobile ? My friend ordered one and he's on the same service as you so I can tell him what he might expect. I don't know if Mac321 is having the same experience or not on ATT.
I want to buy the phone but I'm trying to gather as much info as I can before hand so I don't have to return/sell the phone.
Thanks for the reply
Yeah if it's not fixed I'll have have my calls forwarded to Google voice number and do VoIP calls.
ice0901 said:
Yeah if it's not fixed I'll have have my calls forwarded to Google voice number and do VoIP calls.
Click to expand...
Click to collapse
Hey man, in what state are you located?
Sent from my MHA-L29 using Tapatalk
DKM119 said:
Hey man, in what state are you located?
Sent from my MHA-L29 using Tapatalk
Click to expand...
Click to collapse
Hey I fixed it. Found a post on a thread that will enable VoLTE on Xiaomi Phones. Apparently they disabled VoLTE starting with MiUi 9 due to lack of certifications in certain countries, the US being one of them. To activate it dial *#*#86583#*#*
Band 4?
ice0901 said:
Hey I fixed it. Found a post on a thread that will enable VoLTE on Xiaomi Phones. Apparently they disabled VoLTE starting with MiUi 9 due to lack of certifications in certain countries, the US being one of them. To activate it dial *#*#86583#*#*
Click to expand...
Click to collapse
Are you getting Band 4 LTE on Tmobile? Also, how about 3G/HSPA? I believe it supports Band 2 for those, right?
Band 4 LTE is rock solid everywhere however I cannot connect to 3G anywhere. That's why I had issues with calls before I activated VoLTE. I'm not sure if it's the phones band capability or something else but even forcing 3G nets me 2G edge. Thankfully I don't need it.

AT&T to Chinese rom?

Guys I've just bought one AT&T Axon 7 without checking the bands so it appears I'll get only 2G here in the UK. I'm still waiting on the unlock code to arrive so I'll test it later on but is it possible to flash the Chinese rom and radio on the AT&T version to unlock the necessary LTE bands?
Problems may occur.
*
It may not be possible to restore it if the model number is different.
When I burned ROM of Japanese version Z-01K in China version Z999, problems occurred in mobile data communication, there was nothing to change from Z999 to Z-01K, but when I tried to restore it An error has appeared if the model number is different.
*
Use Google Translate
That doesn't sound very promising. I guess I got myself a WiFi tablet...kinda.
ugambow said:
Problems may occur.
*
It may not be possible to restore it if the model number is different.
When I burned ROM of Japanese version Z-01K in China version Z999, problems occurred in mobile data communication, there was nothing to change from Z999 to Z-01K, but when I tried to restore it An error has appeared if the model number is different.
*
Use Google Translate
Click to expand...
Click to collapse
Have you found a way to get the Axon M to work on 4G in the UK?
And on what network are you? I'm on O2, and I have no signal at all. It doesn't find any network.
Spir4 said:
Have you found a way to get the Axon M to work on 4G in the UK?
And on what network are you? I'm on O2, and I have no signal at all. It doesn't find any network.
Click to expand...
Click to collapse
2G is only available in some remote Scottish lands so no workaround unfortunately.
skromnia said:
2G is only available in some remote Scottish lands so no workaround unfortunately.
Click to expand...
Click to collapse
I thought 2G had to do with the internet speed (EDGE speed), not with the actual phone signal for normal phone calles
What did you do then? Ditched the phone?
Spir4 said:
I thought 2G had to do with the internet speed (EDGE speed), not with the actual phone signal for normal phone calles
What did you do then? Ditched the phone?
Click to expand...
Click to collapse
Returned back to seller for another reason but otherwise it would've gone back to ebay hoping to get some money back.

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.

Categories

Resources