WEIRD behaviour: Facebook has access to internet, not the Android System nor most other Applicatios

[Vilab]

HI,

First, i am not a native English Speaker, I post there because this Forum is much more active than my own language's, I apologise in advance for incorrect grammar and wording

I ask for help about my Smartphone ( Xperia X F5121 ) as it is working WEIRDLY about its OWN access to internet ( through its own 4G sim card connection )

- the sim card is fine, it gives a good self internet access in other Smartphone

- the phone and its applications work fine when internet connection is shared from an other phone ( using that same simcard )

- the phone + simcard combo can provide full internet access through shared connection to other devices

- the combo Phone + Simcard stopped working fine in "Self internet access mode" a while ago : most application no longer have access to internet, including the Android System itself, Google Chrome, Mails applications, GooglePlay....
BUT Facebook works ( notification + browsing ), and Kindle partially works ( it can download books it already knows i own, but don't realise that i have bought new ones, and doesn't allow me to browse for new ones )

So i have to use a second phone ( + my simcard ) to share internet connection to my own phone so that i can use its application.

I have used this to upgrade most application and Android ( up to 8.0 ), but the problem is still there

i have resetted the network parameters ( on Android ), no effect

Do you have any idea how to fix it ?

 

[B. Diddy]

Welcome to Android Central! Which carrier is the SIM from?

Normally, I'd suggest trying to boot into Recovery Mode and wiping the cache partition, but from what I can tell on the web, that phone doesn't have the option. You might have to try doing a factory reset.

Your English is excellent, by the way!

 

[Vilab]

I live in France, the company which sold the Simcard is "La Banque Postale" ( national mail service, Bank, insurance, communication ), they use the Network developped by "SFR". the simcard had been working in that phone for over a year before the issue

I have checked what the application were allowed to, resetted their parameters, cleared their cache....

The phone fell and split its screen at about the same time this behaviour appeared ( can't be sure, it was Covid time, i didn't use my phone at all ), but i don't think this problem can be caused by hardware issue, the phone can communicate with Internet after all.

No realistic way to trick the phone in sharing its connection with itself ?

I would really prefer not to reset it to factory, my father just did that by mistake to its Laptop... Welcome to 2013 and enjoy Window 8.0

 

[B. Diddy]

I wonder if the phone's SIM reader might have been damaged.

Does everything work normally on wi-fi?

 

[Vilab]

everything work in wifi based shared connection from an other smartphone

the phone + simcard itself can provide shared connection fine via wifi and USB

only facebook works in Self 4G connection

 

[B. Diddy]

Does the same thing happen in Safe Mode? https://www.hardreset.info/devices/sony/sony-xperia-x-f5121/safe-mode/

 

[Vilab]

no change in safe mode, facebook works, everything else don't

 

[B. Diddy]

Do you get a specific error message from the apps that don't seem to connect, or does it just say that there's no connection?

 

[Vilab]

Sorry for the delay,

No specific error message, just the "no conection part"

i realised i have a notification from the "download manager" that a pack of 6 files is waiting to be downloaded : 6 " French regionnal parameters "
( are those language thing ? my phone runs in French. Or actual useful communication parameters ? )

they are " too large and require wifi to be downloaded " ( despite the fact i have allowed all systems and all apps upgrade to use my 4 G connection since troubleshooting the issue )

but even when connected by wifi ( all apps works, the system has internet access ) short clicking on the notification has no effect but to close the notification stream

long clicking brings up the notifications setting and how i want to set up the notifications from the Download Manager ( Sound, visual only ? ), useless

i am decently computer literate ( for an young adult user ), but i am quite smartphone illitirate : i can find the Download Folder to see the files i have downloaded myself, but i can't find that " Download Manager", whether as an individual application or a sub-option in the system option

 

[B. Diddy]

I'm not sure if this is still active, but do you happen to use Facebook's Discover app that allows limited free internet access? https://techcrunch.com/2020/05/06/f...ver, which is part,Claro, Entel, and Movistar.

 

[Vilab]

I only have the basic Facebook application

The simcard has >10Go in store, i can check that amount on the phone, i often use those Go to download stuff on my desktop ( this is about 10x faster than my land connection )