I've had the Maxx since October, activated the SIM card then, everything's been peachy since. Today out of nowhere there's suddenly a notice on the phone "SIM Card Activated, your new phone number is (same as current phone number) ...". I went online with Verizon to see if anything had changed with my account. They made me pick a "security image" and question but everything seems normal. I guess I'll just ignore it, but it's weird. The phone hadn't been shaken or subjected to anything which could conceivably dislodge the SIM card.