mine activated no prob. just change the MEID online thru myverizon account and cranked it up.
after day two everything is running great. none of the hardware problems i've had before with the pre plus or the pre2.
the battery does seem to be about go down as quick as always, maybe even a bit quicker (of course i've been using it a lot more than normal so it may not actually be any worse, but it definitely seems AS bad)
also, keep in mind, my first smart phone was a Palm Centro and went straight from there to webOS, so i've never really used an iPhone, blackberry or Android to really compare teh performance to, but so far i absolutely LOVE it!!!
i started messing around with the world phone settings just to do it. There is an application called "SIM Toolkit" but it says, "there are either no SIM services or there was a problem talking to your SIM". so i went to the preferences under the phone app. under "Security" there is something that says "Lock SIM Card" followed by a "!" in a yellow triangle. tapping it does nothing. under "world phone" there are three options. "CDMA Mode", "GSM/UMTS Mode", and "Global Mode". selecting anything except "CDMA Mode" gets the message, "SIM not detected" and an "OK" button to acknowledge.
it does not appear to have an opening on the case to replace the battery and i cannot find a slot anywhere where a SIM would be either. (also, i've always had Verizon, so never used a phone that required a SIM...not really sure where they go, but i understand they are usually somewhere in the battery compartment? which again, this doesn't seem to have)