why no network after factory

[Android Central Question]

my samsung duos with dual sim i have no network tried everything its tmobile new sim networking in just searching even automatic search nothing can you help please

 

[belodion]

Why did you factory reset? Has the phone ever worked with a SIM?
https://forums.androidcentral.com/showthread.php?t=409154

 

[B. Diddy]

Welcome to Android Central! What's the exact model number of the phone? Was it working on T-Mobile before the reset?