can an unlocked phone be re-locked?

view full story

http://forums.androidcentral.com – Hi, I've been hitting eBay and finding that a number of phones for sale are unlocked. VZW doesn't allow unlocked phones on their network so I have to pass these up and some are really good deals. Can an unlocked phone be re-locked? Does it matter if it's an Android or a Blackberry? If it's possible to re-lock it, how do I do this? thanks, Deb (HowTos)