Ok...the other night I picked my phone up and instead of a 3G or 4G signal strength bar icon up on the notification bar I had some sort of red icon. I pulled it down and it told me I could only make "Emergency" phone calls...... Checked my phone over...nada...so powered down, powered back up and it seemed fine. Next morning I picked up the phone and same thing....this time I got a message telling me I had no SIM card installed..... Powered my phone down, pulled the sim card, re-installed it, powered the phone back up and so far it seems fine.... SHould I take my phone in to Verizon for them to look at or is this just a "glitch" that I shouldn't expect to re-occur with any regularity???