I did a little research and DAOPAY seem well respected so figured I'd give the text option a go (am in the UK)
Note that you need to text "DP nnnnnnnn" to the SMS number given - not "nnnnnnnnnn#" - I guessed this after reading the daopay account.
Anyway about 90s after sending I got a text back confirming payment, clicked the continue option in
legalsounds and now have 10 USD credit for 5.09 UKP (checked my mobile bill in real time). Who knows where the 9pm came from. I don't care...