When you buy a pin off of sythe, just enter in any random phone number. It doesn't matter if it's not the number you got the pin from. To buy a pin by paying the full amount via a text. You get a message saying to you agree to paying the fees etc. Then you reply with Y or N for Yes or No and then they send you a pin I believe. Although I haven't gotten one by texting. I did it once but never got my pin and I was never charged for it.. So who knows.