Mobile connection is not restored after after my phone tries to connect to an open wifi

[BDesco]

I have posted about this issue before (When phone is trying to connect to known or open wifi, it already terminates the mobile connection), and it is annoying as hell. I left early today and for the whole day I could not get mobile internet. This is unacceptable. Please help.

So anytime I pass an open wifi (no matter if I connect or not) mobile internet is dropped and stays dropped sometimes for 30 min sometimes for the whole day. Switching from 3G to 4G sometimes helps (there is no logic), also connecting to my home wifi kinda resets things.

I have tried everything: reseating the SIM, new SIM, ON/OFF, all kind of settings etcetc.
The strange thing is that Whatsapp always has internet (I can send and receive messages), the browser sometimes. Only thing I can think about is that is some issue just in between the hardware and OS: where the OS is set as having connection when in fact there is. Most apps ask the OS if there is internet available (and they get a ‘no’), while other apps like Whatsapp just connect without asking the OS.

I am running OS 2.9 on FP3

[Fox]

@BDesco

I have tried everything: reseating the SIM, new SIM, ON/OFF, all kind of settings etcetc.

Did you try to disable WLAN if you leave the house? Or do you have a necessity to keep it active in mobile usage for other devices instead of a WLAN access point (maybe car connection or something like that)?

That way mobile data should not experience “hiccups”.

Could it possibly be linked to the “data reduction / saving mode” (dunno the exact English description, it depends on language setting) in “Network & Internet” settings, which is app-dependent?

It is interesting that WhatsApp seems to still recognize the mobile internet connection and other apps do it variably.

The WLAN disabling would probably be a “quick workaround”, but no permanent solution.

The easy disabling / enabling of WLAN (WiFi) would be possible by editing the quick access tiles via scrolling down twice (as visible in your screenshot in the now-closed thread of yours) and then clicking on the little “pen” icon on the lower right side:

@BDesco

Then you could put - for testing purposes or long-term, depends on your preferences - the WLAN and “plane mode” tiles to your tile selection and make it available on your two-time scroll down tiles for quick access.

If the “data reduction / saving mode” isn’t the cause, could you verify if either a quick activation / deactivation of “plane mode” resets it - or if disabling WLAN / WiFi prevents it?

That would be my suggestions for a quick check. But I’m no Android programmer, just an user.

[BDesco]

Thanks, last week I explained my problem to Claude.ai. It immediately identified the problem: it was my Access Point Name which was not correct configured or not optimal. I have never touched those is they are configured automatically even when I created a new one, the same troublesome configuration was loaded. Claude.ai told me what to adjust for better performance and up to now no more problems. It was several settings so I don’t know what did the trick and I am not messing with it to find out.