N920c No Service after imei repair & cert patch


Hello …

I have n920c come to me with no baseBand problem security level B:3 ..
steps I do ..
First …
1. Write new cert ..;)
2. Repair imei with cert imei ..Done:)
3. Patch cert ..Done:)
imei is ok and baseband ok in about phone menu ..:)
In service menu imei : NG:confused:
But No service / Emergancy call only:confused:

Second…
1. Repair imei with original imei of device …Done:)
2. Patch cert .. Done:)
imei is ok and baseband ok in about phone menu ..:)
In service menu imei : NG:confused:
But No service / Emergancy call only:confused:
..
..
What should i do ?

thanks ..