just a quick question, shld i attempt to reg. my t-mobile sim 2day? because all i've got is an o2 which i intend to port the no. from. But i really need a phone line this weekend. Seeing that in the documentation t-mobile says reg. on weekends may be done on monday or tuesday in which during the time the sim would not be working? is that true or will you be using a different no. for the time being?