iMessage&FaceTime

IPhone 5s (Brand New, only a few days old)

IOS 8.3

Wind Mobile

I just got this iPhone and have everything set up except for FaceTime and imsg. Whenever i try to activate them both, they say "Your carrier may charge for SMS and messages used to activate FaceTime and iMessage," the second message reads "An error occurred during activation. Try again." I've tried dozens of times and made sure my phone number and the time and everything is right, please help me! it it would send and receive from my apple id email but not my phone number