karbon hardware repair

karbon k330 network is ok but not rechable problem any body helpme please..................

friends,

1.try to format mobile on any flashing box
2.IMEI rebuild / try new
3.change sim card
4.check call setting "call divert" if enable
update here .....................

karbon k451 ringer not working but ringer ok +ve interface of ringer in pcb is ok checked with multimeter but the -ve interface of ringer is also showing contineuty with respective compenents near ringer interface of pcb
how this can solve

karbon k451 ringer not working but ringer ok +ve
interface of ringer in pcb is ok checked with multimeter
but the -ve interface of ringer is also showing
contineuty with respective compenents near ringer
interface of pcb
how this can solve