Intermittent mobile data connection

[flxkkpsychdl]

I was online in the car while on a zoom meeting and went to an underground parking. That cut off the mobile data connection for a few moments and went back up after that. And the connection started to go on and off. Even now, whenever I do a zoom meeting, the mobile data connection goes on and off with around 3 seconds interval between an on to off.

I had

• reinstalled, not working,
• called network service provider, it suggests I reset network settings, which I'm not doing it yet because I don't want to lose passwords,
• and then what has been done was I cleared cache and data, but the problem still occurs

Should I really reset network settings?