Is it illegal to change my IMEI number on my iPhone?

Is it illegal to change my IMEI number on my iPhone?

Added (1). I'm asking this in regards to having a phone that is under a contract that isn't fully paid off so that I can use another carrier?

The point here would be that as it is not fully paid off it is not your phone, and so you could be considered to committing either theft or fraud. If you don't pay it off properly you'll probably end up with a black mark on your credit rating that could take years to clear!

You probably ought to be aware that it's not that easy to change an IMEI number on a iPhone. MOST of the apps that claim to do this will NOT change the IMEI, but THEY WILL INSTALL MALWARE/SPYWARE on your device! Your phone manufacturer is smart, changing an IMEI is almost impossible on a modern phone, but the crooks who want access to your phone know that there are dumb people out there who will fall for their lies!

Sounds like you're trying to commit fraud. We can't help you with your illegal activities.

Here in the US, changing the IMEI of a phone is illegal.