The SMS Way
After you clicked SMS, you'll be shown a text and a 4-digit number, which you have to send to a number.
Write down the 4-digit number (!!) and the time/date you sent the message. That is needed later on to specify your donation.
If you did that, you might have to validate your donation by sending another SMS (one of the SMS-cost is the one of your standard tariff, the other is the donation amount). Then you should get a SMS saying that the donation was completed successfully.
All you have to do then is to write a PM to
Rukario where you say that you've just donated per SMS. There you also include the date/time (
include your timezone as well) and the 4-digit number. Additionally you can include your mobile phone number as well, while you're x-ing out the last 3 or 4 numbers of your number. So he knows that the doations is from you and can add you to the supporters.