Yes it is posible to use skyfire if you are outisde the us watch this video search for it on youtube and read its description!!!

I have succesfully hacked skyfire well not exactly hacked. It is quite simple actiolly. All you need is an us mobile phone number and an e-mail you don't need the sms the number is the pass. I will post a program that gives you those directly.
O and I am writing from skyfire. It is realy nice. How i figured that out siple this was only for americans. This means that it is something stupid. Then it hit me that the number must be the password. It took me 5 mins to get a random us mobile phone number to use and you have it.