Many people use their smartphone all the time, so one of the best ways to mess with them on April Fools' Day is to mess with their smartphone.
There are plenty of ways to do this, including changing the language settings and creating new autocorrect shortcuts, but the easiest way is by changing up their contacts.
Find your number in your friend's phone and change it to mom, their ex-boyfriend's name, or someone famous, and have fun torturing them with texts all day long.
More April Fool Pranks
Fake head in bed
Use a mannequin head and place it next to your partner while they sleep. Wake them up and as they try to look at you they freak out as they see the fake head.
Put tape on the water tap
This practical joke is plain and simple, thus perfect for rookie April Foolers. Put some tape under the water tap. When they turn it on, water squirts everywhere.
This one is great to fool your kids. When your kids are asleep the night before April Fools day you use food coloring to turn the milk in the carton blue!