Louis:
He changes all the names of your contacts forcing you to text everyone to ask for their names to replace them all.

Liam:
Leaves cute little text messages usually to express his love for you in pictures, captions, messages and notes.

Niall:
He prank calls all your contacts which leaves you to explain to the victims on your behalf, not so fun for you.

Zayn:
He filled your phone with selfies. Sometimes he will even send one he particularly likes to his own phone. Wait for the eye roll. *rolls eyes*

Harry:
He sexts every male on your contact list even though its not so funny once they find out it's Harry who did it.

This is from Tumblr but I changed a few things <3