Unable to accept calls, only (by 2 users)

due to some virus attack some of the firmware files which are needed for the operation of that has got corrupted ....
so just try giving restore factory settings ...

if problem persists then
just take your handset to the technician near by and get it flashed ...
the technicians will be having the special DKU series cable which is connected to the pc and the software offers to unlock the phone ,flashing ,to reset the codes to the codes to the default codes etc ...
this DKU series cable are compatible for the certain model ...
there will be different types of DKU cables available ...
if you have this DKU series cable you can only unlock it there is no need to go to the technician ...

if you dont have then
just visit to the technician ..


any doubts reply me
i am always here to assist you..
thank you
bye ...