In English via Deepl:
"Hello,
For a good month now I no longer have access to mobile data on my FP2.
No 4G, 3G or H+ acronyms are displayed, so I only have access to the Internet via a wi-fi connection.
My partner also has an FP2. We have the same settings for mobile data, and yet he has access to them.
Thank you for your suggestions!
Federica"
There are several threads available here describing such connectivity troubles, please also use the search function.
Maybe start with this or read through this if you like.
It could be a problem with your antenna but there are also other dependencies that take influence in proper reception.
Here is a lot to be found on this concern.