Emergency only - G4 Q&A, Help & Troubleshooting

i've got an issue with the telephony,
after 125h uptime i received messages via messenger, "why my phone should be off? the phone is online with 2, 3 or 4G without any issue messenger, browser all works fine. i try to call a friend on 4G i got the message "No Network available" and with 3G network "emergency calls only".
the apn settings are correctly, but i don't need the apn settings to receive and take calls?!. a reboot or switch to flightmode solve the issue for a while.
any ideas to solve this problem?

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Oversize SMS's, MMS and data connections

My wife has a Galaxy Note 2 running stock Android 4.4.2. She is constantly having problems when sending and receiving SMS and MMS messages:
1. Long SMS messages (both incoming and outgoing) are split into multiple messages, and often converted to MMS
2. Incoming MMS messages don't download - there's just a message saying "downloading".
Re.1: I know that there's a 160-character limit on SMS, but is there any way of either preventing this, or at least preventing them being converted to MMS's?
Re.2: In an attempt to solve problem 2, she disabled wifi to force a connection to the TalkMobile data network. This helped MMS messages to download, but had the unpleasant side effect of "breaking" the wifi functionality on the phone - i.e. the phone would never stay connected to wifi for longer than a couple of minutes (even when sitting 6 feet from the home wifi router) - after that it would connect to the TalkMobile data network. This little bug caused her to accumulate £50 in data charges before she realised what was happening. I have since done a factory reset and this seems to have fixed the wifi problem, but has anyone else encountered this?

G4 won't sent text messages (sprint)

Hi everyone,
I just bought my G4 the other day I am running the stock ROM still. This morning I ran into an issue where no one is receiving my text messages. My wife is on sprint also with an iPhone and she is able to send messages just fine so we're pretty sure this is not a network issue. I don't get any errors. In fact it looks like the message is sent but the recipient just never gets it.. I tried calling sprint. They did some she of reset to fix it and had me reboot but that didn't since the issue. I Aldi reset the profile and that didn't fix it either. Shirt of at a loss at this point. Any suggestions would rule.
Issue resolved. Somehow the network setting under settings > more > network mode was set to global. I changed it back to LTE/CDMA and messages went through

Cannot make/receive calls or texts while roaming AND cannot update PRL/Profile

So I don't know why and I have no idea how to fix it but they are definitely related.... I cannot text or call or receive either while I am roaming. I have roaming set to "automatic" and roaming ON for data & voice (I even have the "roaming guards" off). I also cannot update my PRL/Profile, and I receive an error message when trying to do so (error: Connection Error 6502). Anyone have any idea how I can potentially fix this?! Thanks
Same, from what I found out is that my device got deactivated... I need to call Sprint later though
@JoeFCaputo113, you might want to bookmark this site: http://downdetector.com/status/sprint

MM Update: Group messaging & MMS doesn't work if wifi is connected

Hi folks,
I've got a new problem that started after I updated my D851 from (stock/rooted) Lollipop to (stock/rooted) Marshmallow.
When I'm home, I've got a decent LTE signal (ATT, though using the T-Mobile phone variant). But since I'm home, my phone connects to my wifi and uses it for data. I have no problem making/receiving calls or SMS texts to a single person at a time.
However, as long as I'm connected to WIFI (with my cellular signal present but not used for data due to the WIFI), neither MMS nor group texts work. In the stock Messages app, or the Messaging app I actually usually use, these MMS or group texts sit there as "sending..."
If I turn off the wifi, the cellular data signal is used immediately and the texts go through. Same goes for receiving MMS.
Again, this only happens since the marshmallow update that I applied a couple weeks ago.
I have not found a fix. I found lots of people complaining, and a few proposed solutions, like changing the APN so that the APN Protocol would be set to IPv4/IPv6 instead of the default IPv4. See here for that reference, though it didn't work for me:
https://support.t-mobile.com/thread/61843?tstart=0
Anybody have a fix for this? it's a real problem particularly for incoming messages. I can always toggle wifi off if I want to send something, but not knowing when something is coming in gets to be a problem. SMS from single conversations come through.
Please help me troubleshoot this. I've googled my fingers to the bone and while I've found reports of issues like this going back years, no actual solutions that work for me.
HELP!
There's one workaround so far... using Textra as the messaging app. It has an option called the T-Mobile Wifi Calling fix (in Settings/MMS/scroll down to bottom). Even though my wifi calling is set to off, since I'm on ATT, enabling this setting in Textra automatically toggles off WiFi to send MMS/group sms, and it does the same when it detects an attempted incoming MMS.
I much prefer the Google Messages app, for a variety of reasons, and I'm looking to figure out a real fix rather than this workaround. Any help most appreciated.

LOS 18.1 Miatoll network doesn't work

Hi
For about a week now I am facing network problems for sending or receiving sms or phone calls since the last update of LOS 18.1 (june 18th).
I'm on Miatoll since about 2 months, tried to reset network, change preferences, etc... Sometimes *#06# gives me no IMEI so I searched this way, but sometimes I still have an IMEI but the network doesn't work anymore.
It works back when I reboot the phone for about 1 or 2 hours, sometimes less, then it stops working. Either I don't receive sms or I receive them one or two days later. I tried to change the default sms app but it didn't change, also tried to force the SMSC with my operators number without more results... I tried to change the SIM card from sim1 to sim2 with the same result. On another phone (Blackview on android) it works fine. Something weird is that mobile datas work fine most of the time even when I can't send/receive sms or phone calls, but sometimes are also bugged.
Also when the network doesn't work anymore, accessing networks settings just freeze and quit the settings app.
EDIT : When I try to call myself from another phone, it rings normally and goes to voicemail. Nothing happens on my LOS phone. Also, when network is bugged, when I try to call someone it doesn't ring, stays on the call screen. When I hang up its stuck on "hang up", the microphone stays activated and I can't stop it even by forcing the phone app to close. It finally stop after 30 seconds to 1 minute.
I searched through XDA and other forums, none of the solutions I found worked.
I guess I'll wait for the next update or, if it doesn't change anything I'll probably flash a previous rom.
Does someone knows what to do with it ?
Many thanks in advance
I hope it's understandable, I'm not native english. I'll edit the post or give more infos if needed.

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