You need to add people by going to settings>scroll down>and you'll see the username they can add you. Here add me:
AnuXD499

First go to contacts, tap on the "Search" engine, type in my username, press enter, it should show my Lucario icon, tap that and you can chat with me

Thx i'm gona try this ;)

You can direct add someone if you know their username by searching for them like: Pyndan
^^

It's pretty simple: You just download all the porn stickers and spam people with them.

Its pretty easy, and I find it works great on phones. It also synchs perfectly with a laptop computer if you have that as well.