Mobile Data Not Working After Updating to 11.0.0.2 - OnePlus 7T Questions & Answers

My mobile data no longer seems to work after updating to 11.0.0.2. Phone calls and texts still work - issue seems to be isolated to just mobile data. I'm using an international version of the 7T, on AT&T here in the states. If I downgrade back to OOS10 using the MSM tool, mobile data works again. I'm able to use a Google Fi sim with data on both OOS10 and OOS11. I tried wiping bluetooth, wireless, and mobile data with no joy. If I upgrade again from OOS10 to OOS11, mobile data breaks. Any ideas or troubleshooting tips?

APN?

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[Q] No Mobile Data After Flashing Radio

I flashed the T-Mobile KL1 radio and I no longer have mobile data (wifi and cell connection work). When I go to Mobile Networks in Settings, it says Insert SIM Card. I flashed back to KID and still the same issue. I flashed the latest version of Synergy (since there was talk of the Hz tweak causing problems) and still no joy. I am without mobile data. Would restoring from a Nandroid do anything? Any suggestions? I'm freaking out here.
Okay, I restored from a nandroid I did right before flashing (let that be an example to always backup) and everything works fine now. Please return to your regularly scheduled forum.
Sent from my beastly Galaxy S 2.

Mobile network issue after updating to Android version 9

With the official update, I upgraded my mobile to Android version 9. After the upgrade I am having issues with the mobile network. Incoming call is working but outgoing call and mobile data are not working. Is this a known issue ? What can i do to make it work again ?
rukeshrai said:
With the official update, I upgraded my mobile to Android version 9. After the upgrade I am having issues with the mobile network. Incoming call is working but outgoing call and mobile data are not working. Is this a known issue ? What can i do to make it work again ?
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No, this is not a common or known issue. How did you upgrade...by taking the OTA? If your bootloader is locked, you can still flash a full OTA via adb from the Google Dev Site. It should be easy to find a guide on how to do this. The full OTA is also called a rescue OTA and you will not lose your data. You could also do a factory data reset from the stock recovery. This will of course wipe your existing data, but if you have a non-functioning phone sometimes you just have to bite the bullet. Best of luck.

Anyone having a data roaming issue with Oreo?

Hey all, I'm a Canadian truck driver that has an (unlocked) S7 Active (on T-Mobile) that I've recently upgraded to Oreo via Odin. The phone works better than ever except now when I'm in Canada, network data no longer works properly. I say properly because every once in a while it will connect long enough to receive a few emails then will disconnect again. But most of the time it just doesn't connect. The data roaming worked perfectly on Nougat (BRA7).
Here's what i've done so far:
Clean install of Oreo (CRE7) via Odin 3.13.1
Factory reset via recovery
Cleared Cache via recovery
Data doesn't connect properly.
Downloaded CRE7 again in case it was a bad download.
Repeated the flashing, factory reset, and clearing of the cache just in case something went wrong.
Data still not working properly.
Updated from CRE7 to CRH1
Updated from CRH1 to CRJ1
Cleared cache
Restarted phone, cycled airplane mode, #766#
Data still not working properly
Bought a new SIM thinking that may be the problem. But no change with the data.
And yes mobile data and international data are turned on in the phone.
When I flashed the phone I was at home in Canada. So I thought maybe it would have to connect to a T-Mobile tower to get the proper network settings. So on my next trip to the US, the data worked perfectly in the US once it connected to a T-mobile tower. But once back in Canada it stopped working again.
When I manually try to switch to a Canadian network (Bell, Telus or Rogers), I will get the message "Disconnect Network... Unable to search for networks while data service is in use. Stop using current data service and search for other available networks?" Which I find strange because the phone isn't connected to data.
I have found a temp solution to getting the LTE to work by opening an app that requires location data (in my case it was Weigh My Truck), and that seems to force the phone to connect to the LTE network.
I've bought a 2nd s7 active to have as a spare phone and won't be updating it until Oreo is 100% stable on the S7 active.
Does anyone else have this issue? Is there a permanent fix?

Mobile data & WiFi

I neither have mobile data nor WiFi after I replaced my battery. Some WiFis appear, but not the one I am usually connected to. I also cannot make calls or use mobile data.
Any ideas?
The phone worked normally for some days until I restarted it. Ever since, all radio functions (mobile data, WiFi, cellular network) have not been working anymore.
Update: IMEI and MEID seem to be correct. Also flashed ZUI based on Android 7. WiFi works with ZUI, but not on AEX. Cellular network is not working at all.
flel said:
The phone worked normally for some days until I restarted it. Ever since, all radio functions (mobile data, WiFi, cellular network) have not been working anymore.
Update: IMEI and MEID seem to be correct. Also flashed ZUI based on Android 7. WiFi works with ZUI, but not on AEX. Cellular network is not working at all.
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Qfil stock rom

Problem with mobile data after odin flash

Hi
I have a small problem with my Samsung
I have a version G988N Korea. At the moment I have an android 11 and yesterday I tried to install android 12 by odin. Everything went well but I didn't have mobile data. I can make a phone calls but I can't use Internet. I tried to change APN etc
I installed android again and then I had mobile data. Do you know how i can fix that
Regards

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