Hi,am planning to buy a new phone.I need recommendations,so any is much appreciated.

Requirements:
1) Brand= Don't mind any brand as long as its reliable, n easy to claim warranty.

2) Budget= Anywhere from RM0 - RM2k. As low as possible, but in the end quality over quantity rite haha

3) Need good battery life, at least 1 day of medium usage preferable.

4) Usage mainly for whatsapp, facebook, youtube, maybe some brainless game to destress after a long day at work, GPS gotta be fast too

5) Minimal lag

6) Small screen, maybe 4.0 inches - 4.7 inches? I'm ok with bigger screens too,as long as one-handed usage is easy and it fits it my jeans pocket, I don't have deep pockets, physically and fiiguratively lol.

Does such an android phoone exist yet or should i just bite d bullet n go for Iphone SE?