Your post was blank @AnastasiiaN6058 and there's not much to go on in the subject.
If you want assistance from the Community Forum then you need to explain/describe your issue clearly and in detail.
When was it working ok last?
What changed in the meantime?
What are the exact symptoms of the problem?
Any error messages?
What exactly is/isn't working?
Connection to the 48 network - i.e. signal bars?
Incoming/outgoing calls?
Incoming/outgoing texts?
Mobile data?
What happens when you try to use outgoing services?
Any error messages?
If you need to contact 48 support about this then see the links in my signature below.
