The printer has a PictBridge connection, but an iPhone is not recognised as an unauthorised accessory. As Fetzair already recommended: connection via WLan works great.

Unfortunately, I can't answer or help. It was a gift for my aunt. I'll be happy to check/test it occasionally. Please understand.

This should work if you use USB-C on your tablet or mobile phone. With Mini USB and Iphone without jailbreak this does not work. However, I recommend connecting via wifi.