Oneplus 6T 3g not exist and not able to call sometimes? - OnePlus 6T Questions & Answers

hello everyone i used to have a oneplus 3t but sadly my friend broke it and i bought an op6t from second hand market. its great except for some calling problems. I always have 4g+ working. i have 2g(edge) most of the times but sadly i never had h+(3g) and also i cant make or receive calls most of the time even tho 4g(lte) works fine. i dont understand why. i am at official latest stable oos version 11.1.2.2. and my version seems like A6010. if thats correct. (i bought as second hand for cheap). i am in turkey and using turkcell. Any help please?

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Voice quality making a call with Three

Hello all, I purchased my Zuk Z1 about 3 weeks ago now and to be honest I regret buying the thing. The WiFi is poor and the phone is also missing Band 20 - 800 Mhz that is widely used in the UK.
Another problem I'm experiencing is making voice calls with network three. Whenever I make a call the quality is not very good and I seem to get a hissing noise as well. If someone rings me this doesn't happen?????
I've tried the three sim in my Nexus 4 and the call quailty is fine.
I've also got a Virgin sim in slot 2 but have no problems with that at all.
Anyone got any ideas? Thanks.
I really wish I'd just bought the Nexus 6P now.
Hi, I am also on 3 and have been using z1 for a week now, used in London and Midlands area.
I don't seem to be experiencing the problems you have, call quality seems good, wifi good and 4G coverage. Certainly no worse than my previous nexus 5 which was my main phone for 2 years.
I'm still somewhat confused by the band 20 stuff. The phone supports 800 MHz according to the specs. I know 3 is currently rolling out volte - is this what you mean?
I do have the same problem with my simcard...I'm using du simcard at united arab emirates..
My calls are the same on 3. No 4g either
Hello...
I installed the ZUI version stock ROM and I'm not facing this problem anymore....I think it's much better than CM12....
Ramshu97 said:
Hello...
I installed the ZUI version stock ROM and I'm not facing this problem anymore....I think it's much better than CM12....
Click to expand...
Click to collapse
I agree with you on ZUI being better than CM12,especially with the Zuk1 OS. It adds to the experience rather than taking away from it, like the heavy Samsung skins do
Is it possible to use voLTE in zuk Z1 using ZUI?
I am unable to make confrence call in my zuk z1. It shows an error. Unable to merge calls. Pls help me to resolved this issue

U.S. ATT Compatibility experiences so far? And unlock experiences?

Hi folks,
Considering getting a 6T off the OnePlus site.
For those that got the devices early:
-Do you have experiences on AT&T Network to comment on how compatible it is? I've had some devices use to work well on ATT now not so good due to band migration; just curious to hear how the 6Ts fare.
-Please confirm: both SIM and BootLoader unlocks can be done immediately when purchasing from the OnePlus site (as opposed to the T-Mobile edition that's locked)
-Are there band/frequency differences between the T-Mo and ATT Versions? I'm on ATT but usually have bought "T-Mo" versions of devices because they were less likely to be BL locked; but my last phone (OP3T) broke me out of that cycle.
Any other AT&T-relevant experiences would be appreciated.
Interested in this as well.
I would like to know as well. It's kinda looking like we will have to test it out ourselves.
I am on AT&T with the 6t. I've only had mine for a week but have had no issues with anything network related. I came from a 3T and have better service with my 6T. There were 2 dead spots on my drive to / from work with the 3T that I no longer have with the 6T. I haven't had a chance to root or unlock mine yet due to being busy at work but so far I am happy. I loved the 3T but don't miss it a bit.
I have a 6t that I bought directly from OP that I use as my daily phone on Cricket, which uses AT&T towers. I have no signal problems, and download speeds are great. Anywhere I expect to have LTE I have it.
Phone is by far my favorite device I've had. Easy to unlock, install TWRP and flash kernels, and install mods through magisk!
I've bought my phone but don't get to open it until Christmas. It should arrive in a day or two. [emoji1360][emoji1360]
Sent from my ONEPLUS A3000 using Tapatalk
Works perfectly. Even gets VoLTE calls
Did you do anything special for volte per some of the threads? Also, does ATT visual voicemail work fine without a fuss? It's working well on my rooted 3T.
Sent from my ONEPLUS A3000 using Tapatalk
Funk2641 said:
Works perfectly. Even gets VoLTE calls
Click to expand...
Click to collapse
What did you do to get volte? Was your previous phone an att branded device? I came from an unlocked S8 that didn't get volte and I can't get volte on my 6T. Prior to my S8 I had the 6P which also didn't get volte.
I suggest reading this thread, https://forum.xda-developers.com/oneplus-6t/help/att-verizon-volte-vowifi-calling-t3860031. There's information on how to enable VoLTE settings on the phone. Most of the stuff in that thread pertains to Verizon, but some AT&T stuff too. Ultimately it's up to AT&T to provision your service properly. VoLTE is available. VoWiFi is not. Took me a couple of days & a couple of hours on the phone with AT&T support to get my line provisioned properly because the IMEI wasn't recognized. But that was only days after the phone was released. Would think that shouldn't be a problem now.
Once you get VoLTE working Visual Voicemail should work, but you need to use the AT&T app. However, for me it isn't always automatically retrieving VMs when I get them. My notifications will show I have a VM but I have to open the AT&T VVM app, go into the menu and Refresh. Only then does it pull the VM into the app.
This should be interesting. On my 3T I have ATT visual voicemail working, and it mostly works for transcribing messages (except long ones like my wife leaves...) But I don't think the phone is volte capable so I've never tried setting that up. I don't get to play we the phone til Xmas though!
Sent from my ONEPLUS A3000 using Tapatalk
Frankenscript said:
This should be interesting. On my 3T I have ATT visual voicemail working, and it mostly works for transcribing messages (except long ones like my wife leaves...) But I don't think the phone is volte capable so I've never tried setting that up. I don't get to play we the phone til Xmas though!
Sent from my ONEPLUS A3000 using Tapatalk
Click to expand...
Click to collapse
Yeah. I came from using a 5yo AT&T branded HTC One M7 and VVM worked fine on that. When I first got the 6T (unlocked int'l version) & popped in my sim, I had VoLTE but I couldn't get the VVM app to activate. That's what prompted my call to AT&T support. That's when they told me VoLTE was needed for VVM. I'm not entirely sure how accurate that statement is. The rep tried a bunch of stuff to get it working, including updating my line with the IMEI from the 6T. That's when things went bad. I lost all data completely. Actually, if I switched APNs, I could get 3G data. But it took two days before AT&T sorted it out and I got LTE back. Since then everything pertaining to AT&T service has been fine. I've never found the need for VoWiFi, although it would be cool to have, if necessary. And I wish their Advanced Messaging feature wasn't so limited.
Frankenscript said:
Hi folks,
Considering getting a 6T off the OnePlus site.
For those that got the devices early:
-Do you have experiences on AT&T Network to comment on how compatible it is? I've had some devices use to work well on ATT now not so good due to band migration; just curious to hear how the 6Ts fare.
-Please confirm: both SIM and BootLoader unlocks can be done immediately when purchasing from the OnePlus site (as opposed to the T-Mobile edition that's locked)
-Are there band/frequency differences between the T-Mo and ATT Versions? I'm on ATT but usually have bought "T-Mo" versions of devices because they were less likely to be BL locked; but my last phone (OP3T) broke me out of that cycle.
Any other AT&T-relevant experiences would be appreciated.
Click to expand...
Click to collapse
On att rn. Have been since the op2. No issues at all ? first thing I do is unlock bootloader
I got my 6T (Int'L) on or about Nov. 23, which I had purchased from OT - I am using it on a Family mobile plan which uses T-Mobile towers. VoLTE was not a part of my original service plan..but because I needed a New Nano-SIZED sim card for this phone, adding it to my account wasn't as straight forward as it normally is. Once I switch my number to the new sim card, I got an email saying if I wanted VoLTE/VoWiFi(?) features turned on - I'd have to go to another website (Cricket/Verizon/ AT&T?) to register my new sim card and this would "turn on" the VoLTE features. After all this I get a Bright "VoLTE" Icon on the status bar whever i get my LTE signals - So it is VoLTE capable. Perhaps AT&T is doing something similar to get your VoLTE activated?
My plan is to do some testing next week for basic stuff before transferring my flag from my 3T. Will report back how it goes. Appreciate any other Insights from other users!
Sent from my ONEPLUS A3000 using Tapatalk
Fired mine up yesterday when I got it. Got it all set up, then swapped out the SIM from
my Mate 9, to the OP6T this morning. Apparently the "speed" issues I had with the 9
are corrected with the 6T. I use a Straight Talk MVNO (tracfone) at&t card. Previously,
I was LUCKY to get between 9-10 meg down, 1-2 up. Now I'm getting 33 meg down, 15 up.
Guess the newer phone has a better modem, or the extra frequencies to work more proper
with the newer device.
So far, no issues, working good.
After my experience with the OnePlus One, I was still a little cautious about buying something
from them again, but, on the surface so far it appears they might have their act together.
Stay tuned.
I came from a OP3 been using the 6T with ATT prepaid for the past month and it works great. Far superior in speeds to the OP3. For example at my house I was getting download speeds of about 30mbps on my OP3 on the 6T I got over 90mbps LTE+ at home! I keep pissing off my buddy who just got the brand new iPhone XS on ATT and he is getting half the DL speeds that I am when comparing speed tests :victory:. Don't think VoLTE works on prepaid but I have yet to try to enable it. About to go to nebraska for vacation to test service out there.
Bootloader is very easy to unlock. Did it the second day of having the phone following the Official XDA employees youtube video.

Note 7 Global Version - Bad connectivity / no incoming calls possible

Hey guys,
i got my Redmi Note 7 Global Version from honorbuy on Tuesday and i really like it. I'm living in Germany and have one big problem
with my phone, i have a bad connectivity/reception and many incoming calls dont work. Other people can't reach me, even if
there is one stripe at 4G Connectivity. I also don't get a reminder of a "tried call". Sorry for me english, i hope you can understand
this.
I have the correct APN Settings and even tried my old smartphone (Mate 9) and there is no problem with calls. If i call someone
else with the Note 7 it is no problem, but he cant call me back, this is very strange. It doesn ring and the guy whos tries to call
me just gets an info "No reachable at the moment". Do you have any ideas what could help or
is it maybe even damaged or a software issue ?
Thank you very much
xs1cht said:
Hey guys,
i got my Redmi Note 7 Global Version from honorbuy on Tuesday and i really like it. I'm living in Germany and have one big problem
with my phone, i have a bad connectivity/reception and many incoming calls dont work. Other people can't reach me, even if
there is one stripe at 4G Connectivity. I also don't get a reminder of a "tried call". Sorry for me english, i hope you can understand
this.
I have the correct APN Settings and even tried my old smartphone (Mate 9) and there is no problem with calls. If i call someone
else with the Note 7 it is no problem, but he cant call me back, this is very strange. It doesn ring and the guy whos tries to call
me just gets an info "No reachable at the moment". Do you have any ideas what could help or
is it maybe even damaged or a software issue ?
Thank you very much
Click to expand...
Click to collapse
I dunno much about Germany but I have the Chinese version in America on Cricket and the Signal is phenomenal. Try to move around. Did u check your lte bands before purchase?
kenennaoyeka said:
I dunno much about Germany but I have the Chinese version in America on Cricket and the Signal is phenomenal. Try to move around. Did u check your lte bands before purchase?
Click to expand...
Click to collapse
thanks for your response. Yes, i checked the bands and the global version supports german bands (20). I reseted the smartphone and now it seems that it works. Maybe it was also just an issue of the provider, i changed the
connectionen to the provider.
xs1cht said:
thanks for your response. Yes, i checked the bands and the global version supports german bands (20). I reseted the smartphone and now it seems that it works. Maybe it was also just an issue of the provider, i changed the
connectionen to the provider.
Click to expand...
Click to collapse
Great. I'm glad it worked out for u. I'm installing the EU rom in 2 days. I hate the Chinese rom
kenennaoyeka said:
Great. I'm glad it worked out for u. I'm installing the EU rom in 2 days. I hate the Chinese rom
Click to expand...
Click to collapse
Whats wrong with chinese rom.? Curious because i ordered one and was thinking to stay on stock.
GTRanushka said:
Whats wrong with chinese rom.? Curious because i ordered one and was thinking to stay on stock.
Click to expand...
Click to collapse
No Google services integrated

Horrible reception?

So my girlfriend now owns a 6T. It's pretty awful so far. It was a T-Mobile variant, flashed with the patched MSMTool and on the latest open beta.
Her phone is ALWAYS dropping calls, calls won't go through, texts won't always show etc. We went to T-Mobile and swapped out the SIM.
Has anyone else ever seen this before?
And no, this is a totally separate phone from the one I had issues with (I sold that one on Craigslist)
aNGERY said:
So my girlfriend now owns a 6T. It's pretty awful so far. It was a T-Mobile variant, flashed with the patched MSMTool and on the latest open beta.
Her phone is ALWAYS dropping calls, calls won't go through, texts won't always show etc. We went to T-Mobile and swapped out the SIM.
Has anyone else ever seen this before?
And no, this is a totally separate phone from the one I had issues with (I sold that one on Craigslist)
Click to expand...
Click to collapse
I have none of the issues you mentioned, and mine is a T-Mobile version converted and running the latest Open Beta. Do you live in a rural area, or an area with bad reception?
Sent from my ONEPLUS A6013 using Tapatalk

ONEPLUS 7t Mclaren 8 8T ON MINT SEVERE ISSUE FIX

Hello all i have just switched from tmobile to mint mobile about 25 days ago and my fiance and dad they both love service i did as well when it was working so this hopefully will help alot of people if you are able to find this thread i started on the service by upgrading to a new phone had the one plus 7t went to the mclaren edition and started having non stop text and phone issues texts would either not send or have to go into airplane mode and then normal or restart and calls sometimes wouldnt dial out and incoming calls from specific numbers would just hang up before able to get a ring or fast busy ive read alot of old posts and have not seen anyone answer this yet i went through 2 mclarens and a oneplus 8 and now a 8t to figure this out inbetween i had a nord 10 5g unlocked direct from oneplus and made a guess that it was the tmobile varriant software and i was right!!!! the issues if your having similar problems will be 100% resolved by rebranding your oneplus tmobile varriants to global it doesnt change your bands or what not but something in the tmobile software doesnt allow mint this is conrimed because i had a nord and everything worked fine but of course i wasnt happy with the ram and speed after having flagship phones so ordered 2 oneplus 8s on amazon and they falsely advertised saying they were in2010 of course i got in2017 that is the oneplus 8 8gb tmobile varriant so all you have to do is first unlock your sim so you can use any carrier you can do that through the phone under settings wifi and data and then at bottom should say unlock and request a perminent unlock i belive the standard requirments are to have a tmobile phone that was on tmobile network for at least 40 days if you havent but still have there service can call and ask say your going out of the country and doing development and then after that step 2 is to request a bootloader unlock that takes 7 days roughly give or take a few hours you can submit request to start the 7 day wait here https://www.oneplus.com/unlock_token and then you will need to convert your phone to a global version i will try and find link for mclaren but ill drop links this is for oneplus 7t lucky there is way to skip sim and bootloader bypass here is link https://forum.xda-developers.com/t/...thout-unlocked-bootloader-sim-unlock.4153943/ oneplus 8 https://forum.xda-developers.com/t/guide-convert-to-global-wip.4105885/ and oneplus 8t i didnt find it will start looking but i promise you i just did this to my oneplus 8 and it works flawlessly ended up setting up return because i ended up paying 470 to 480 for the 8s and found a local oneplus 8t sim unlocked 1 month old with the glass cover on screen and cameras perfect condition for 500 cash so lucked out just submitted my bootlaoder unlock and i know will work great i hope i have helped alot of people here sorry if this has already been told but i was not able to find anywhere when i started the journey i had no idea and went through weeks of turmoil i dont want anyone else to do so just follow the directions thanks guys take care
That was hard to read.
I have a OnePlus 7t Pro 5g Mclaren on Mint as well. I'm having nothing but trouble with it. I tried one of the Lineage builds and still had problems. I've tried every apn and setting combo I can think of. I've worked with Mint support and gotten nowhere.
I'll look into your info of rebranding. I'll be honest: I'm skeptical.
This looks sketchy to me. Not trying it.
I loaded up AOSiP and am rock solid reliable again. Receiving all calls, SMS, MMS. Not looking back. Try it. You'll like it.
Pure Android goodness.
So true T-Mobile variant on OP8 does not work on Mint. Works great on Global. Trying a maccleran now -- but what is the OP pure stock? Does not seem to be one.
Pretty sure this issue (unreliable calls, calls ringing straight to voicemail, sms sending and receiving issues) applies to all recent OnePlus T-mobile variants when used on MVNOs that use T-Mobile 5G or LTE. Makes absolutely no sense to me, haven't found a fix, very annoying. Also our phone can't be converted to Global because there never was a global version made of the 7T Pro 5G Mclaren, it was only available from T-Mobile.
On 1+7tproNR (HD1925) and using Los 17.1, rooted and mint mobile with never once an issue,
Safteynet passes, gpay works, Netflix, Snapchat, games, I use google dialer & messages, I have never once changed the APN, just left it on auto. Not sure which Los you are using

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