Your post is confusing and you'll need to provide a bit more information and context if you want assistance from the Community Forum.
What do you mean by "I put this sim back in"?
What SIM?
Back in to what?
Where was the SIM before?
What is the background to this?
Then you say "my mobile data isn't working" but then "I have data".
This seems contradictory and confusing.
If you mean that mobile data isn't working then are you sure that your APN settings are configured correctly?
When and where was mobile data working ok for you last?
If you need to contact 48 support about this then see the links in my signature below.
