[G4 Android Development] Derpthunder:
TL;DR: How do I collect logs for everything if the phone acts like it's been given cyanide and LSD on a single blotter? Is it even worth it?

All right, so after initial problems with just the battery life that people here helped me to solve by disabling Ambient Play, I finally popped my SIM card in and switched to my H815 from my other phone.

Got the SIM card issue but had the Ril Control app installed already so that didn't pose too much of a problem. Transferred all my contacts and texts, installed all my apps and connected my accounts. That was Thursday, around 1pm

Maybe a few hours go by and I get he first serious crash - the phone just shut down and didn't respond to power button. I took out the battery, waited a moment, slided it back in, tried again - nothing. Cold brick. Then I thought that, having some other issues with charging, the charge indicator might have been wrong about how much juice there was left and it simply died having none left. So I plugged it to my power bank and it booted into the system on its own, showing around 60% battery. Unplugged the power bank and it lived long enough to prove that it indeed had 60% battery and the problem must've been somewhere else.

The next day everything was ok, no crashes, maybe one SIM card problem, quickly resolved with Ril Control.

On Saturday everything seemed as stable as on Friday. Made calls, exchanged e-mails and texts, browsed the net both on WiFi and on 4G, took pictures, recorded videos, listened to music on a Bluetooth headset - all good.

On Sunday, in the early afternoon after having been taking pictures and videos for around 2 hours (sightseeing, I took the phone out to take a pic every 5 minutes or so) the camera app crashed and I lost the last two pics. Just restarted the app and continued. After a few minutes it crashed again and I found 2 green screens instead of the two most recent pictures. Restarted the app again and after another 10 minutes the phone experienced another total crash and shutdown after which it did not respond to the power button. Did the same thing as on Thursday - connected the power bank that I now view as a defibrillator more than anything. It booted up, but behaved as if it sustained some sever brain damage after suffocating - and I mean some ridiculous stuff I can't really figure out how it'd even make sense technically to malfunction this way. The home button and the recents button don't work, only the back button does. Those are bloody soft keys, right?

So I tried rebooting the system again - didn't help.

Disabled the navigation bar, re-enabled right after - didn't help.

Disabled > rebooted > enabled > rebooted - didn't help.

Switched the home app to Luna from the Google one - didn't help. Switched back - didn't help. Did variations of the above trying to reboot between actions - no effect.

Another thing - the slide from the top brings out the quick settings but the settings icon there doesn't work. Another slide down doesn't open the full menu (stays on just that mini one). The customise button doesn't work either.

The notifications ceased to work at all. I get the sound of the text or fb message or a call, but nothing in the notification area or a pop-up. Nothing on the lockscreen either. I have them set to "on for all apps" and "hide sensitive notification content" in the settings. Tried toggling thing but all to no avail.

I noticed that I can send and receive messages but I can neither make or accept calls. No amount of reboots or ril stop/start cycles helps.

The ril module crash started to happen much more often as well.

Also, I cannot disable the mobile data. If I go to settings and toggle it, the mobile data icon stays and if I go back to that setting I find it still on.

So now I've ended up with a phone that

can only do one thing at a time (can't switch apps, only back all the way out to the home screen and start another one from there)

where the camera app is unrealiable,

doesn't really function as a phone (the calls thing),

doesn't keep me updated - I have to check my apps manually to see if there are updates awaiting

whenever I want to disable location or mobile data I have to open the settings app and search for it because the default set of icons on the quick settings menu doesn't include them.

the battery performance dropped as well as - not sure if it's just because of the mobile data staying on or if it there's some loop going on somewhere.

Of course I'll just make a backup of my stuff and re-flash the system all over again.

How do I collect some logs before that, though? Would they even be useful to anyone here? Going through them would likely be like trying to figure out what's wrong with a patient that doesn't have a single healthy organ left.