went to singtel, found out i cannot upgrade but can only get the additional bb service which is extra 14/mth, adding to my current plan my bill will be about 55/mth.
i plan to get a 2nd hand bb 9780 which will cost about 350-400.
think its worth it i guess, to whatsapp dear <3
shall go down to hp shop at my house downstairs ask price tml.