Is there a way to use custom changing wallpapers on home screen like lock screen multi pack without using 3rd party apps?

Is there a way to track my sleep cycle as in it will track the time the phone stays switched off ?So after i switch off my phone when i go to sleep, it will automatically tell me how long was i asleep for when i switch on the phone in the morning.I a...

Is it just me or the fingerprint sensor in m35 is sometimes really inconsistent?

Thewifisignaldropsbarsjustinthenextroombutitworksperfectlyfinewithalltheother mobile devicesinthehouseAnotherproblem,isthe5gkeepsswitchingrepeatedlywith4g,but thesamesimcard on other mobile devicesinthehouse cons...