1. Go to FrontlineSync on your phone and click on 'Settings'. If you have not installed FrontlineSync follow the instructions here.
2. Scroll down to SMS Rate Limiting and click to open.
3. This will open the Rate-limit SMS sending page allowing you to select the limit you want. The feature works best with intervals of 30 minutes. Choose either 30 or 50 messages every 30 minutes. Alternatively, you could select No Rate-limiting to turn this feature off.
4. After making your selection click 'Save' and you're done!