To request recommendation, what u need to post:

1. Brand -
any

2. Budget -
sky's the limit, but i'd prefer a value for money phone, don't wanna be paying rm3k for a phone which has similar specs to a rm1.5k phone (if phone available with telco installments do inform me)

3. Specs -
the current best.
no need brilliant selfie camera, but good front camera a must
phone with custom roms also can, so long it's bloody good
lots of RAM/ROM even better
expandable SD card slot preferrable

4. What you need in the phone
the best in the market.
planning to start playing games on mobile phone so good GPU and battery life is a must
size of phone doesn't matter.

Which ones are 64bit?

I heard 64bit doesn't lag.