Type 1: their phone background is of themselves
Type 2: their phone background is of their significant other
Type 3: their phone background is of themselves and their partner; a couple
Type 4: their phone background is of a couple, usually fanart of an otp or a show couple
Type 5: their phone background is of their favourite character
Type 6: their phone background is some really fancy art or quirky/minimalistic kind of thing
Type 7: their phone background is of their pet
Type 8: their phone background is of their family or friends
Type 9: their phone background is one of those stupid shitty backgrounds that are already part of the phone and they never bothered to change it
Type 10: their phone background is one of those stupid shitty backgrounds that was already part of their first phone in 2005 and they’ve painstakingly transferred it to every subsequent phone