Happy Bday AyUta!
The phone straps I have
are
A MUSEUM 30th Single Live with the 31 diamonds inside the A (my favorite :3 )
and
ARENA TOUR 2002 A the one with the tie-dye A and peace symbol
I like the A MUSEUM one because the A symbol detaches with a little clip thing and I can wear it as a necklace or whatever I want to, not just a phone strap
and I am attracted to sparkly things
***EDIT***
Here is a closer up image of the right side so you can see the phone straps heheheheheehehehehe