My daughter has been using her iphone 4 and twitter sms (21212) on Virgin Mobile Canada for the last 6 months without any extra charges. This month's bill now shows a 20 cent charge for each twitter sms to 21212. I called Virgin Mobile and they say that they have always charged for the twitter sms yet I have bills back to March 2011 that show no extra charges. Virgin Mobile Canada wasn't helpful at all. Does anyone know why this is all of a sudden being charged? Any advice would be greatly appreciated.