[G3 General] Preter:
Hi Matthew,

Saw your PM. Just to confirm that you have the same problem.

​

Error message - "The mobile network will be unavailable until you restart with a valid SIM card inserted"

​

- Bar counts up to 100% before phone reboots automatically

This is apparently a very serious problem with Android going back a few years and a few Android OS versions (KK I believe). It happens with various phone models ranging from:

LG G4

https://www.reddit.com/r/lgg4/comments/43p26p/sim_card_removed/

Nexus - Google doesn't give a F*CK

http://androidforums.com/threads/sim-card-problems.467384/

Motorola, Nexus, Samsung Galaxy etc.

https://code.google.com/p/android/issues/detail?id=66964

Google apparently doesn't give a rat's ass about it. As such it is very difficult to pin-point the problem. I have flashed & re-flashed robalm's V2 ROM at least 4 times, each time with a complete (nuke) wipe of everything including the Internal SD card. It definitely happens on the default modem (21C supposedly) that comes with it. Different modems have not helped. If you find one that works, let me know.

It cannot be a SIM card problem. Cos I've never ever taken it out since the day I got the phone. Once the problem happened, I've tried re-seating it, wiping the electrical contacts with microfibre cloth etc. Singtel shop customer service checked all the APN and network settings and confirmed it is correct, asked me to try the SIM card in other phones. Done that, nothing wrong with the SIM..

Googling further, some folks discovered that it is due to Google Apps (Play Store, Maps, G+, Gmail, Play Books/Games/Movies/Music/Services etc. etc.), which are system apps (as part of the ROM package), causing the problem after they are updated via Google Play Store. Don't we all update apps to the latest version, no?

I tried uninstalling all the updates for all of them (Settings>>Apps>>) and replacing them with the factory updates that came with the ROM. I usually freeze all the crap money sucking subscription based or in-app purchasing Google Apps that I don't use anyway. However, whether frozen or not, it still happens. Although not freezing any of them does seem more likely to cause the problem to become even more severe - like going into constant reboots as opposed to intermittent ones. When that happens, you have to go to airplane mode BEFORE the countdown completes and reboot happens. At least when it restarts, it won't hunt for the missing cellular signal and triggering another reboot. This then allows you to freeze the suckers more agressively.

It worked for a few days - I thought I had narrowed the problem down to Google Play Store, Play Framework and Play Services. But yesterday or so it has come back again with a vengeance. Freezing Google Play Store does not help by the way - besides what's the point if you can't use Play Store?

Problem is, disabling the auto-update functions on Google Play Store using:

(Play Store>>Settings>>General>>Auto-update apps>>check "Do not auto-update apps")

doesn't stop Google Play Store and Google Play services from auto-updating themselves! F*ck Google! You cannot prevent it no matter what.

Worse, everytime it auto-updates itself (or if you uninstall updates) - note that it will switch to the default setting of "Auto-update apps over Wi-Fi only" again. So you have to be fast in going to Settings in Google Play each time you reboot and open Play Store.

Some netizens have suggested ADB command line means to cripple the auto-updating. But to me that is not the freaking point. It's about trying to isolate and find the problem.

You end up uninstalling updates for Play Store several times a day but when you find that the cellular signal is gone (no bars), you realise that it has sneakily updated to 6.0.5.

But even when I uninstall all updates for Play Store. It

can

still happen. Maybe less frequently.

No cellular signal is bad enough. The worst aspect is the rebooting. I tried restoring my beloved KK 4.4.2 Nandroid backup but apparently I'll have to find a compatible modem again as TWRP 2.8.0 (or my previous version before upgrading to TWRP 2.8.7 for this Marshmallow) didn't manage to back it up (even though I tick everything).

Still doing trial and error to try isolating the problem. The Google apps clue seems the more likely cause, but I can't say I can discern a definite pattern yet.

It could be a bug in Marshmallow 6.0. Maybe 6.1 will solve it. Maybe its the damn Polish ROM/modem.

In the meantime, I can only say - Do not flash this ROM! Without any cellular signal, the phone is not a phone. The constantly rebooting makes it useless!