/** Default checking period for SMS sent without uesr permit */
private static final int DEFAULT_SMS_CHECK_PERIOD = 3600000;
/** Default number of SMS sent in checking period without uesr permit */
private static final int DEFAULT_SMS_MAX_ALLOWED = 100;
You can send 100 messages from any 1 application every hour. Any more and your phone will get cranky. Stay tuned. I have a way around this that doesn't require you to elevate your permissions ;)