A100 call ends automatically

[Trion]

I have got an A100 that apparently gets full signal, but when a call is made the phone displays "call ended". Any suggestions?
This phone had been flashed before and was working fine. But one day it started giving this problem. Please suggest any solutions. Thanks in advance.

:)

Trion

[Trion]

Hi kevinn13,

You replied to my question, but the reply doesn't show up here. Could you kindly re-post the reply?

Thanks,

Trion:)

[essojay]

put *2767*2878# into phone.