I have htc desire 820 dual sim and i cant make an outgoing call or receive incoming calls

[Android Central Question]

Why cant i make an outgoing call or receive incoming calls on my htc desire 820 dual sim,i thought it must be the problem of sim but when i put it in another handset it can make a call .Please help me

 

[B. Diddy]

Welcome to Android Central! Which carrier are you on?