I'm using Samsung Galaxy Fit(S5670) and running official 2.3.6 version. My battery's capacity is 1350mAh. Can I increase this capacity to 1500mAh or 2000mAh?
Can I increase this capacity to
Did you mean increasing capacity from
1500mAh on same battery??
It's not possible.
If your phone supports a battery with capacity
2000mAh, you can buy a new battery with these increased capacity.
Check manufacturer's website for details of phone and batteries.