I just gave it a go, to make sure it all works, and went with allopass which gave 984 Shadow Crystals. I just sent an SMS to the number, got a confirmation code right back instantly and then typed it...

Hey, you're right! You can get 982 Shadow Crystals for £5 of phone credit. That's equivalent to 1176 for £5.99, which is less than the 1300 you would get with App Store purchase or PayPal, but - as...

EDIT: It is possible. Go here, enter your Shadow Era account email address, and click on the mobile phone picture in the top right corner.

I have a Pay-As-You-Go mobile phone which I top up by...