Kenny, why can't you use Touch ID?!
Dunno, I put my thumb on the thing when I was setting it up and it accepted it. but after it was set up, it would no longer accept my thumb print.
I only have the use of one arm so when I added the print, the phoned was lying on a table as opposed to in my hand. Maybe when I did it I was off kilter a bit.
My mate has suggested adding more prints to it in the hope one of them works. He said you can use any prints of the ones you have stored
Ill use fingers instead of thumb for the additional prints