How to use smart phone?

Best way to use smart phone

how to use smart phone and i will show you how to use smart phone easy
best way to use smart phone you can not this step in android phone because this step
very dangerous to your smart phone.

don't do it in smart phone

1 don't close recently apps
2 don't install any mobile anti viruses
3 don't use battery saver
4 don't install extra apps
5 don't install any cleaner
6 avoid to local apps
like a thump lock
fingerprint lock
face lock
its all fake apps and its very dangerous to your smart phone