A few weeks ago I updated to Android 10, and since then my FP2 sometimes behaves strangely. For example, I can open the picture folders in the file manager, but not the folder with the videos, then the file manager is closed immediately. The connection to the WLAN is often not stable, despite a good signal. And the system is slower than before and occasionally boots spontaneously.
The biggest problem at the moment is that I no longer have mobile Internet access, the mobile data no longer works. I was in Switzerland and had booked a data package especially for this (no roaming!), which I could not use with one byte, despite active mobile data (even when roaming).
I do not know what can be the cause, because I had this problem also in October in Portugal. Back in Germany it worked again, but now it’s different: mobile internet still doesn’t work, despite some restarts. Possible causes: Provider/ SIM, hardware or OS? Who knows?
I contacted my service provider on this matter; it’s possible, that the SIM has to be changed or that the card reader does not work well anymore. First I’ll try the SIM in another mobile phone to check it.
A SIM can be broken even of working in another phone (I had this in the passt already). Also, sometimes there might be the need to adjust the APN manually. Your provider can give the correct settings to compre and correct.
What’s about this malfunction? Any simular experience or comment on this? Another effect: Previously, I had a button at the bottom with small white squares that brought the overview of installed apps and now it is no longer there.
I’m totally non-technical and this probably won’t help you, but I had similar problems with this update. Random restarts, no easy access to all the apps, poor (at best), or totally unavailable internet through mobile signal. I tried downgrading to 3G and no change. … but then, about three weeks after the update, it’s working again. Getting a good 4G signal, realised that you just pull up from the bottom of the screen and they’re all there. Works as it did. Uses slightly more battery power, but as I’ve been fiddling with it more as a result of the downgrade in ability, I can’t even be sure that’s the case. I didn’t change anything except tried 3G and then changed back when it didn’t work.
So I’m sorry if I haven’t got an answer except that I feel your pain and time seemed to heal mine. I really hope you find an answer.
I registered the reference to the test with 3G and tried, but without success. Even after returning to 4G, mobile data no longer works.
Normally, the connection type is displayed next to the mobile signal strength triangle (E, 3G, 4G, LTW). This information is now missing for me. It seems that this is related to the mobile data malfunction.
That’s just the problem I had. The triangle showing mobile reception was showing good to excellent reception, there was no wifi available, and there was no 3G 4G or anything by it. If I was in the total open with an excellent signal I once had an indicated 4G, but if I tried to access anything online it stated no connection. But after two weeks it suddenly worked again.
Perhaps following a restart (spontaneously or not)?
As this has been mentioned as work-around by @ArjenU for similar problem, probably also after upgrading to Android 10: No 4G after wifi
(Apparently issue occurred under Android 9 already - see link in post #2 in that thread.)
Try turning it off and on a few times. I always turn my phone off overnight. This morning it also wouldn’t go to 4G. I restarted it and still no 4G. I turned it off, waited a minute and turned it back on again. 4G back on.