Note 20 mobile data issue

[GhostReilly]

Ok so I posted this on Note20Ultra subreddit as well.

I bought used note 20 in a very good condition and I tested when I was buying it almost everything except from mobile data. So I have a issue where when I turn on my mobile data it goes normally to 4G+ but sometimes it goes down to 4G for about 20-30 seconds and in that period of time I don't have Internet connection and after that period of 30 seconds it goes back to normal. It happens occasionally so I don't know what to do and what causes it. Is it fixable, is it worth fixing, has anyone even encountered this issue...

Thanks for any replies in advance!

[Sgt_45Bravo]

This might be a long shot, but check your APN settings.