READ FINE PRINT of Terms of Service from CanadaUnlock Oshawa, ON. "5. I understand If I am unlocking an Android device such as a Samsung or any other Android model, that I must make sure prior to ordering that my phone prompts for an unlock code automatically when I insert an unsupported SIM card. If the code does not work and the phone does not ask for a code automatically then no refund will be issued in this case." Customer Service was responsive to all my questions which continued for 2 days, but no 'heads up'/proactive advice for dummies like me. Code was delivered as expected. Unfortunately, i paid $25 and 2 days of frustration and achieved nothing. ALSO, you should know that this company has a contest to win free service by providing your opinion/review, which is introduced as soon as you have paid, before the code is delivered and hopefully successfully installed. This means that many of the opinions provided in the numerous reviews may well be premature.