[This game is no longer in operation.]
Replace the stock Messaging app on your phone with something a bit more stylish - the Persona 5 IM App!
Based on the in-game app that all of the Phantom Thieves use to plan their infiltrations, the Persona 5 IM App does everything you'd expect from an SMS & MMS app, such as viewing, sending, receiving and deleting messages, with notifications to alert you when a new message is received. You can even change settings to turn some features on or off, or change the colour scheme from the classic red to something a little different!
Disclaimer: installing this app does not make you a Phantom Thief, will not give you special powers and will not force you to go to bed early every night.
Also, please note: the app is a replacement for the stock SMS & MMS messaging app, so if you normally have to pay for these type of messages, you'll still have to pay for them when using this app.