Each Decipher TextMessage, VoiceMail, or BackupBrowser license code is initially only valid for a fixed number of iOS devices. "Activation" is how you tell us which iPhones, iPads, and iTouches you want to apply your license to. You can add activations to your license at any time within the program or by visiting our website https://deciphertools.com/license-management/info.php
To activate a device, you can either right-click on the device and select "Activate" or you can click the information box in any conversation for that device.
Please note that the way the software records activations to your license code, resetting/wiping a phone and reusing it does NOT require a new activation. Only an actual new device requires a new activation.