I bought a Droid Bionic new in box from amazon, can't activate it on VZW prepaid, their prepaid service doesn't support LTE. Without a SIM card the device is essentially useless as you can't access the home screen. I tried to activate it on NET10 by purchasing an activation kit from Walmart, couldn't activate it as a CDMA device nor with the AT&T SIM card (I can't get T-Mobile in my area but I assume the result would be the same). You should be able to get a VZW sim card from a VZW store but that won't help you activate it either. Anyways the AT&T while not a recognized sim card did allow me access to the home screen and functionality as a wi-fi only device. Purchased a Incredible 2 new in box from Amazon as well (it is to old to push OTA updates so I am stuck with the software it shipped with unless I root and run a mod), it is a global device and comes with a VZM sim card but I haven't tried to put that in the Bionic b/c I read on another forum that swapping VZW sims can render them useless as they're not traditional GSM sim cards. Anyways long story short if you're planning on purchasing an older phone for use on VZW prepaid I'd try buying a recently deactivated device from a friend as it will give you the ability to attempt to register the device (you can register for VZW's prepaid service w/o buying a device from them or paying any money up front if you're planning on bringing your own device.