I have successfully installed MS & AT on a Galaxy S3. Soon I will be travelling to Europe, where I would like to take advantage of lower cell rates by using local prepaid SIMs rather than the SIM from my North American service provider. Any advice how to make those SIM swaps without locking up the phone or uninstalling AT?
see documentation. disable AT, enter new SIM and launch Anti-Theft UI → this will add the SIM to the trusted list. then enable AT again.