There are two types of phones—those locked to a carrier and those free to use whatever carrier they want. There will come a time when you need to know which one your phone is. Thankfully, you'll have ...

Wondering whether that iPhone you plan on buying off of craigslist is truly unlocked like it says in the ad? Want to make sure that your iPhone is able to switch carriers after a legitimate unlock ...

Not sure if your phone is carrier-unlocked? Handy web site IMEI.info can tell you if you simply provide your IMEI number. What is an IMEI number? IMEI stands for International Mobile Equipment ...