1. Budget 2. Are you an advanced user So if budget ain't a problem go for Iphone 11 and above. Or Samsung S20 and above. If budget is tight go for Xiaomi they cost slightly less than iphone and Samsung, if that's also tough go for Techno or lower end Samsungs like Samsung A13. 2. If you're an Advanced user i suggest you avoid iphone coz the amount of restrictions and unusable features make it a little at a disadvantage, I would suggest High end Xiaomi. Not low ends as they perform poorly and same with other Xiaomi branches like redmi. Good Luck!