Why my network is not working ?

[Easy N Easy N]

I just bought this Samsung Galaxy s8 on Facebook at market place a second hand first day I bought it I put my sim card and it was working the day after network just stopped working but its showing that the sim card is inserted but it's no calling or showing data signal...I have tried different sim cards but still it's not working

 

[mustang7757]

Hi welcome !

You try calling the seller?

 

[Kizzy Catwoman]

I definitely would contact the seller

 

[Mike Dee]

Try the seller as suggested but contact your carrier as well to see if they can identify the problem or at least check your network settings.

 

[B. Diddy]

Welcome to Android Central! What's the exact model number (in Settings>About Phone) and which carrier are you on?