Pre-order the New Samsung Galaxy Z Flip4 & Galaxy Z Fold4 and, for a limited time, get twice the storage and a free case!
Holvy's profile

New Member

 • 

1 Message

Thu, Mar 3, 2022 3:51 PM

OnePlus 7TPro service issues

My 7TPro McLaren just stopped being able to make and receive calls as of yesterday. Anyone know how to fix it? Support keeps transferring me around, and I never get a straight answer.

Accepted Solution

Official Solution

New Member

 • 

29 Messages

5 m前

Must mean that 3g shutdown has completed in your area as of yesterday.

Unfortunately, the OnePlus 7T Pro [McLaren] is not on the whitelist of acceptable phones and it will not do LTE/VoLTE calls.

https://www.att.com/idpassets/images/support/pdf/Devices-Working-on-ATT-Network.pdf

(edited)

New Member

 • 

9 Messages

5 m前

@Holvy - Hey man, so ATT and all the "official" people here will tell you that your phone is no longer compatible with the network, but don't give up and go buy a new phone yet. Try this, first go get a new SIM card if you don't have a brand new one from AT&T. After that is done, follow these steps in this link. These are general steps for OnePlus devices, even though the link specifies a certain handset. You're basically trying to manually enable VoLTE, which AT&T now requires for voice services to work. Here are the steps: [GUIDE] Enable VoLTE & VoWiFi on all devices NO ROOT. | XDA Forums (xda-developers.com)

You only have to follow the steps from the part where you dial *#800# and forward. You don't have to downgrade anything or download anything like it says. That's for a different device than yours.

(edited)

ACE - Sage

 • 

98.6K Messages

5 m前

@michael_barnard71

Again you are repeating information based on your model of phone (6T) which is on the  list for people who have a phone that is not on the list!

dmapr

ACE - Expert

 • 

6.4K Messages

5 m前

@michael_barnard71 to expand on what @formerlyknownas is saying — it does not matter at all that the device can actually support VoLTE, it only matters that AT&T recognizes it as such, which happens based on the IMEI of the device. So even if VoLTE is enabled in the phone, as soon as it connects to the AT&T network it'll be rejected as incompatible if the IMEI does not resolve to a model known to AT&T as supported.

New Member

 • 

2 Messages

5 m前

I have a oneplus 6t an 7t. The 6t works fine, 7t stopped being able to make or receive calls but could do everything else just fine. Been in the store 3 times this week and on the phone for hours each day with multiple different departments. Some people were more helpful, others dissmissed my problem and said the phone will not work with their 4g hd voice network and I would have to get a new phone (THIS IS NOT NECESSARILY TRUE). I found a solution online for something else that ended up fixing the 7t looking up forums like this. I just got it working tonight when I got home. Dial *#*#4636#*#*  then Select phone info. A wierd screen pops up where you need to change the preferred network type to LTE only. Scroll up and down till you see it. After this the phone was immediately avle to make calls! No SIM swap (which I was about to do tomorrow) or reboot or anything. Try it. I hope it works!

New Member

 • 

5 Messages

5 m前

I have a 7t which is in the list but I can't use VoLTE

New Member

 • 

2 Messages

5 m前

@kax17  try the solution that worked for me on my oneplus 7t I posted above.

New Member

 • 

3 Messages

1 分钟前

Jesussavessinners you just made my year! I did the code on my OnePlus 7t. Now I can call/text again on ATT with my 7T!!! Amazing! I don't have to use the Alcatel trash on hotspot carrying two phones (Edited per community guidelines) anymore! Thank YOU!

*#*#4636#*#*.  Is the code. Follow his instructions. This would probably work on a OnePlus 6 also? What about a 3T? I'm itching to try both.

(edited)

ACE - Sage

 • 

98.6K Messages

1 分钟前

@ananas238

Now I can call/text again on ATT with my 7T!!!

Unfortunately, that's not what's happening.  That code forces the phone to roam on T-Mobile's 3g network.

   T-Mobile is shutting off its 3g starting this month. 

   Either switch phones, or switch carriers.

New Member

 • 

3 Messages

1 分钟前

@formerlyknownas 

I'm not sure what you are responding to. The OP had a OP7T Pro McLaren issue on the ATT network. All the answers were assuming the issue came from ATT's move to VOLTE and that phone not specifically whitelisted. My particular model of OP7T was also not specifically whitelisted. The code Jesussavessinners posted worked for me. I am curious as to whether or not it worked for the OP's McLaren. One day I might want to buy a OP7T Pro McL, and if that code works, then I'd love to know. Anyway, your response:

"Unfortunately, that's not what's happening.  That code forces the phone to roam on T-Mobile's 3g network.

   T-Mobile is shutting off its 3g starting this month. 

   Either switch phones, or switch carriers."

Your response seems like you posted in the wrong forum? IDK, just doesn't have anything to do with the OP, or any real replies to the issue. That code forces "the phone." Whose phone? Yours or the OP? Why are you talking about t-mobile's network in an ATT forum? 

ACE - Sage

 • 

98.6K Messages

1 分钟前

@ananas238

Does not matter what phone you have.  If you lose voice and text, and typing that menu code in restores talk and text it is because the code forces the phone to roam on t-mo 3g. 

New Member

 • 

3 Messages

1 分钟前

@formerlyknownas 

How could this code be forcing my phone to roam on T-Mobile's network? I've never been a T-Mobile customer in my life. I've had a SIM from ATT and been using their prepaid service for years now. Putting in this code doesn't magically turn me into a T-mobile user. That's incredibly random, too.

The code obviously did what it says it was doing. It forces my phone to use 4g VOLTE ONLY since that is the new baseline at ATT. Previously my phone had the capability, but was not set at 4g VOLTE default. Apparently, my phone and others don't work properly on ATT unless they are forced to 4g only. I'd been hoping there was a way to set that in my phone, and thank goodness now there is.

ACE - Sage

 • 

98.6K Messages

1 分钟前

@ananas238

(sigh)  the menu that code opens allows the phone to connect to T-Mobile.  T-Mobile signed an agreement with AT&T years ago to be able to roam on AT&T because their own network was not expanded enough.  

https://www.lightreading.com/4g3gwifi/atandt-inks-last-minute-3g-roaming-deal-with-t-mobile/d/d-id/775491

https://www.reddit.com/r/tmobile/comments/pepq14/tmobile_roaming_on_att/?utm_medium=android_app&utm_source=share

And sprint had a reciprocal agreement with Verizon as well, when Sprint existed

joeldf

ACE - Guru

 • 

769 Messages

1 分钟前

@ananas238 

What @formerlyknownas says is right and this has been known for several months now.  You don't need to have T-Mobile service at all.  It's AT&T that is allowing you to jump to a T-Mobile tower - that's what "roaming" is, and always was, about by the way.

This isn't magically giving you VoLTE. It's simply switching you over to another service to continue your phone calls over 3G.  Likely on T-Mobile's HSAP+ network which they called just "4G", but is really still part of the 3G spec.  That's why you probably see "4G" in the upper right corner during calls instead of "4G-LTE".

However, because it's still part of the 3G spec, once T-Mobile shuts their 3G service down in the next few weeks, it'll take that fake "4G" with it.

Need help?
Fix, replace or check device delivery
New to AT&T Community?
New to the AT&T Community? Start by visiting the Community How-To.
New to the AT&T Community?
Visit the Community How-To.