DEVICE
Your Device must be compatible with, and not interfere with, our service and must comply with all applicable laws, rules, and regulations. We may periodically program your Device remotely with system settings for roaming service, to direct your device to use network services most appropriate for your typical usage, and other features that cannot be changed manually. Devices purchased for use on AT&T's system are designed for use exclusively on AT&T's system ("Equipment"). You agree that you will not make any modifications to the Equipment or programming to enable the Equipment to operate on any other system. AT&T may, at its sole and absolute discretion, modify the programming to enable the operation of the Device on other systems. You can get details on AT&T policies for modifying Equipment by calling 1-866-246-4852.