Lost Data Connections - Huawei Mate 9 Questions & Answers

Hello All,
I have this phone for about a week, i have one major issue with Mate 9.
Whenever I send or receive MMS messages, my cellular data connections would stop entirely. My remedy to this issue is switch on and off the flight mode, then everything would resume to normal (but i can't do this all the time). I have tried to reset APN and got a new SIM from my wireless carrier, but no success. Has anyone experienced same issue as mine? How do i resolve this issue? please help!!

same here, phone from Dubai, I am on T-MO

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[Q] Galaxy S4 persistent connection problems

Hello
I'm suffering connection problems with my S4 for over 3 months now. I've tried everything including switching to Cyanogenmod and back to original, factory resets, other simcards, ....
Sometimes my phone works perfectly and then suddenly I can't receive calls/make calls or send text/receive text messages. the only thing that keeps working is Edge/3G.
When i then try to call someone, it says 'Mobile network not available' although I see my carrier at the bottom of that notifications panel.
The service state says: speech:not in use data:in use or sometimes it says out of service and I have no network at all (except Edge/3G)
When i switch to flight mode and back sometimes the problems are solved for a short while but not always...
I'm desperate to get this solved and I lost my warranty because I flashed Cyanogenmod :/ any ideas?
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[Q] No SMS while on wifi, can't switch from wifi to cellular

My Nexus 5 is running Android 5.0.1 (Lollipop). Unlocked, not rooted. My carrier is Cricket. Here is what happens:
1. If the phone is connected to a WiFi network, I am unable to send text messages. The message will attempt sending for a while and then basically timeout. The app will report that the send failed. This will happen no matter what application I use (Hangouts, Google Messenger, chompSMS...). If I'm on the cellular network, texts send find. EDIT: Actually I'm seeing that's not actually true. Even when I'm on LTE, there's no guarantee messages will send. I can't actually detect a pattern here.
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[Q] Service wont come back until reboot?

Hi everyone, I have a OPO on Straight Talk and I've been having issues with it when I lose service. Sometimes if I have no signal, once I move to an area with signal I have to reboot for it to connect to the network. Has anyone had this issue? Is there a setting I can change to fix it?
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I am also having the same problem. I am in India, my carrier is BSNL. Any solutions, suggestions friends?

S6 not registered on network etc...

Morning all
We have an issue with my wife's S6(UK, stock up to date software, EE network)
A day ago if she tried to make a call and she just got a message stating 'Not registered on network. She's not getting any incoming calls or text messages either. And not able to use mobile data (wi-fi ok)
Tried all of the normal things, restarts, manually selecting network etc. The only thing that solves the issue is to select 2G only in the network settings, then calls and texts are ok, but obviously mobile data is non existent.
We have been though the troubleshooting with EE on the phone, part of this was to try another SIM which did not solve it, so we know the problem is with the phone.
Also done full factory reset last night, did not help at all.
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Can't make or receive calls suddenly.

Hey guys,
This morning, my Mate 9 stopped making or receiving calls. 4G data works just fine. I am on AT&T using the chinese version MHA-AL00, been using the phone for few months now without any issues.
When I go to Settings-> More->Mobile Network->Card1 Network->Preferred Network Type and set it to 3G/2G auto or 2G only, my phone doesn't have a signal anymore. Switching to 4G/3G/2G auto brings signal back right away but only data works.
I came across a thread with similar issue on mate 7 but tried what they suggested with no luck
https://forum.xda-developers.com/mate-7/help/make-receive-calls-t3245378
Any help or suggestions would be greatly appreciated! I love this phone, don't want lose it over this issue.
Thank you!
try change the sim card to the other sim slot and see what happens, i have two sims with tmobile and at the beginning my old sim was disconnecting for no reason I went and replaced it and problem was gone.
try airplane mode on, then off

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