1## 9.6\. Premium SMS Warning 2 3Android includes support for warning users of any outgoing 4[premium SMS message](http://en.wikipedia.org/wiki/Short_code). Premium SMS 5messages are text messages sent to a service registered with a carrier that may 6incur a charge to the user. 7 8If device implementations declare support for `android.hardware.telephony`, 9they: 10 11* [C-1-1] MUST warn users before sending a SMS message to numbers 12identified by regular expressions defined in `/data/misc/sms/codes.xml` 13file in the device. The upstream Android Open Source Project provides 14an implementation that satisfies this requirement. 15