Why am I unable to make a call on my phone?

[AC Question]

i have no idea

i have lenovo s920.... the problem is the sim is detected but cant make any call or message.. when i tried make a call it says mobile network unavaiable..plese help me fix this prob..;(

 

[belodion]

Re: i have no idea

Welcome to AC.

The first thing to do is to ask your carrier to test the SIM.

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