When you buy your SIM you get a free number that comes with the
activation. And if you want to keep your old number from a different
carrier it a fee that comes with it I believe it round 25 bucks or so.
My advice get the new number.
That is a physical phone issue not a sim card carrier issue (public
mobile).For wifi issue:A. Restart your phone.B. Make sure your phone is
not in airplane mode.C. You can update your phone software.You can use
your phone on wifi without a sim card i...