Using phone for almost 4 months, while operating the phone having multiple applications running on background i.e. with heavy usage no lagging has been noticed yet though using it for long duration.

its ip68 and its water proof. i have done photography in pool as well.

yes

super smooth and awesome , phone doesn't get heated up either .

yes, i works.

5g enabled phone.. But not for India.. Starting with European countries and Korean

Yes..but depends upon the person who's using it also. My wife is using S10E and she is more comfortable with that one

snapdragon is better than exynos. I think samsung can't sell exynos in USA. otherwise they would have fone that to reduce the price in USA.

If u put your phone in normal low pressure / bucket or mug nothing will happen but our advice is do not go in swimming pool or some other lake with this phone.

Yes. A majority of mobiles sold in India are unlocked phones i.e. they are not locked by any particular mobile carrier such as Airtel, Vodafone etc. You can use it anywhere in the world