How am I to unlock the phone with outstanding payments?
Fortunately, the seller agree do to return.
And it will be my last time to buy phone through Internet.
i was totally wrong this time and the seller changed his mind.
he decided not to return and blamed on us.
we have to refer the case to pay-pal.
and it will be another long waiting time to solve the problem.
and the phone will be useless because i could not unlock the phone although the seller had changed the battery.
it is the lesson well learned. and there will be no more.
3 strikes in a row is no fun and hard-hitting.