lumia invalid sim?
 

HI
I have lumia 610 mobile before it was working with sim fine but when i reset the phone now then it ask for pin code and puck code now it's is emergency calls only i have flashed phone using best tool but same problem invalid sim.
I am confuse is it country code or network code while it was working well with pakistani sim here?
How to solve it?
If someone have solution for it please reply.
Thanks.

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