How to Test Battery and Cellular Network 。 1. Press and hold Small Silver Butt n for up to 5 seconds to perform tests. 00 0 2. Device will provide visual and audible test results. Refer to LED Indicator Light and Audible Messages (chart below) for details. 0000 0000 0000 。 。 。 。 。 。 。 。 。 。 。 。 How to Cancel Emergency Call 3. Press and hold the Small Silver Butt n for up to 5 seconds.
