You'll need to explain the issue more clearly if you want assistance from the Community Forum.
What exactly do you mean by "old SIM in new phone"?
What exactly is working?
Incoming/outgoing calls/texts?
Mobile data?
What exactly do you mean by some apps working, some not?
Which ones in each case?
What happens when some don't work?
Any error messages?
If you need to contact 48 support about this then see the links in my signature below.
