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- Or you can skip straight to it and work it out for yourself here
Step 1: Mobillcash
Mobillcash, the service that we're going to use to carry out this instructable, is designed as a payment system to allow online merchants to accept payment directly from people's mobiles. It works in the same way as premium text messaging services - the customer recieves a text message from the merchant's website at a premium rate, which pays for whatever service the merchant is offering.
We are going to be using the same principle, but a little more creatively. By setting yourself up as a merchant, you can send yourself premium rate text messages and the money that your mobile account is charged is paid into your own bank account. This allows you to reclaim any credit that you have left on an old sim card back into usable cash.