I noticed that I had a pop-up message today that my sim was re-something'ing (I say re_-something because I can't remember the something part) then the phone reset (I've never had a reset since I got the phone last month), then later today as I was coming out of the subway at "Grand Central" the phone gave me a weird message that it was going into "global mode" the 3g came back then a few minutes later and phone normal since. Any idea what is going on here?