The K-Touch Tianyu B832 is light on features in the traditional sense. It lets you program five numbers into a notification list to send texts to those five numbers. If one of the five numbers replies with an SMS, the phone locks itself until something happens. The phone has TV-Out, MP3/WMA/AAC playback, WAP browser, JAVA, and is only available in China/Hong Kong. It’s also available in the U.S.”]
Source: https://gizmodo.com/k-touch-security-phone-lets-you-brick-it-when-stolen-241628