moblie data not working

Hey guys, if you have any idea or issue on how to fix this please help! So recently I’ve been seeing issues regarding to my 5G mobile data and when I’m in specific areas it doesn’t work at all! It seems to be disconnecting constantly, but that doesn’t happen for other phones such as my family’s (we’re using a family plan). They seem to not disconnect or have weak mobile data unlike my device, it also reconnects and then disconnects at occasions which makes me so annoyed and I finally want a fix to this. Again, please help!