A5 2017 restarting

[Blasamdk3]

Hi,i have a5 2017
Is restarting,I have bad signal,mobile data doesnt work and I cant sent text's.
My sim card is ok.
Can you help me
Sorry for bad english I'm from Serbia...

 

[B. Diddy]

Welcome to Android Central! Has it always been like this, or did it happen recently? What's the exact model number of the phone (in Settings>About Phone), and which carrier are you using (i.e., which network is the SIM card from)?

Does it also happen in Safe Mode? How do I use Safe Mode on my Galaxy A5? | Samsung Support UK