QUOTE(1qaz1qaz @ Sep 4 2017, 02:45 PM)
just answer 1 question
if the number was not registered before me, how is the number active in whatsapp?
and the point here is not about whatsapp
you misunderstood.
any msisdn is recycleable. and judging by how active our mobile users are, slim chance that you'll be getting virgin numbers. my primary line registered ~7yrs ago already have 3 users before me.
how long a deregistered number gets recycled and re-offered on the market, it's up to the telco.
it just happened to be that you snapped up a msisdn (new, from your point of view) a month after it was deregistered by previous owner.
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of course your msisdn already have an active whatsapp since it was registered for by previous owner. *duh*
telco and whatsapp have no relationship. yes, the telco already cleaned up its own relationship with previous owner. but whatsapp does not have that deregistration detail. you can't blame whatsapp for maintaining the account opened by previous msisdn owner as account was never cancelled.
I had same issue with rhb. previous owner didn't pay celcom bill; got deregistered. then I registered. but since rhb have no relationship whatsoever with celcom, it never dissociate the number from previous owners, and until today rhb still refuse to clean up and stop sending TAC to me. hell, even all his/her whatsapp contact chased me instead for his/her unpaid monies.