Step 1: Press Manufacturer choose your Brand , press model choose your phone to unlock , press country USA , press carrier Verizon..
Step 2: Complete the form which includes your IMEI number and your E-mail to receive unlock Verizon phone code.
Step 3: Wait until receiving the confirmation email that your device has been unlocked (take hours to few days – depends on your Phone official carrier)
Step 4: insert non accepted sim card . phone will ask enter unlock code. please enter code you receive from imeiunlock.me.
in case of iphone ,
You will be requested to restore to latest iOS version using iTunes, the you will get congratulation message on iTunes stating that your iPhone has been unlocked. Done!