Some news about some ongoing issues:
Now there are three FP2s under LOS 17.1 in my family (let’s call them device A (mine), B and C), so we can do further testing about the current bugs.
FYI: Device A has magisk and is rooted, device B has magisk and is rooted, and is encrypted, device C hasn’t got much more than basic LOS, just a few apps but that’s about it.
Mobile data issue
I had it quite often again lately, but it is again random. We have observed the same bug on the three devices.
When and how we observe the bug: When using mobile data, most of the times after a relatively long period (a few hours) during which the phone has been inactive (by this I mean not in use, or at least internet not in use) but not in flight mode (could the problem be related to the SIM card going inactive and it would need to be “pinged”), we want to use mobile data, and the app either doesn’t download, shows an internet error, etc… although mobile data is shown as being connected in the status bar. To check I start Telegram, and if it keeps saying “Connecting…” for more than 10-20 seconds I consider I have the issue (it also works with Discord).
Also a strange fact: in the last one or two months, I have observed that one week I had more often the issue and the second nearly never, and over again. And it is the same for device B, and the same weeks as me (can’t tell for device C). Device A is updated weekly nearly as soon as the new build is available, device B is updated around once a month, device C is updated when we think about it 
, so I don’t think new builds are the problem. The three devices are under the same provider (Free Mobile France), so we suspect it could be related to it.
Also, our newest observation is that 4 to 5 minutes of flight mode can most of the times overcome the issue (one minute isn’t enough). But at this point, it’s faster to reboot the phone…
Random reboots
There was a topic in German about this some time ago, in which a few users had the same issue. I remember it was @DeepSea’s case but I can’t remember the others nor find the topic.
Device A and C get random reboots around once a week, device B never.
When in use: the screen freezes completely (i.e the clock stops, I can’t tap anything) and reboots after a few seconds. Locking the screen makes it reboot as well.
When not: it just reboots (though it happens less often I believe)
At first I had thought it was only when charging, but it happened when it wasn’t.
Then I thought when it was when using WhatsApp, but device C hasn’t got WA (it has Messenger though).
And then it also rebooted when locked (but it’s perhaps a hardware issue for these few times, the phone was in my pocket…).
Other
Dual SIM
Device B has dual SIM issues: card 1 (Free Mobile France) is on 4G, card 2 (Telekom de) on 2G. Card 2 works without problems, but when card 2 is in, card 1 has many network issues (sometimes can’t be reached, disconnections during calls, poor network). When card 2 is out, card 1 works without any problem. Though these problems were already there under FPOOS Marshmallow, so it’s probably a problem with the firmware.
Therefore two questions:
- Why isn’t it possible to disable a SIM in LOS 17.1? Why do you have to get it out? Would that be possible?
- Will the android 9 upgrade on FP2 allow anything useful/new to be ported to LOS? Could it help solve issues?*
Also, I was considering switching to /e/ at some point but decided to stick with LOS. But actually I might do the switch if the bugs become too annoying.
