This tutorial will guide you in “app unlocking” your HTC S621. I was hoping to create something like ‘how to app unlock a windows mobile smartphone’, but after spending hours and hours trying to unlock my phone, I’ve discovered there are possibly hundreds of different ways - no two are the same, and not all will work for all phones. I can only confirm that the following method works for Rogers (a Canadian mobile provider) customers using the HTC S621. It may work for other Smartphones as well.
App unlocking will allow you to install “unsigned” 3rd party software. If you’ve ever received the error “Installation was unsuccessful. The program or setting cannot be installed because it is not digitally signed with a trusted certificate”, this tutorial is for you.
