why isnt my phone recognising either of the sims ?

[AC Question]

i had given my phone for repair, and recieved it after 20-25 days, following which i switched it on and inserted both my sim cards which are airtel and jio. its already been 2 hours and the phone is recognising both the sims but isnt registering on either networks.

 

[belodion]

Perhaps damage was done during the repair?

 

[tube517]

What phone do you have?