For travel purposes (not resell), I'm looking to unlock my iPhone 5. My iPhone 4 and 3GS were unlocked by AT&T, but seeing as how I don't use them anymore, I need my new 5 unlocked. I'm not advertising anyone's service, so I'm not going to name names of services I've looked at. All of them require your IMEI number to complete the 'factory' unlock through iTunes. Alot of people claim success with the process. Is there anything that someone can do maliciously with my IMEI number? If I give that out, am I setting myself up for any potential exploits? Is this a safe process?