Just got a new SIM card? If you start sending hundreds of texts right away, carriers may flag your number. SMS warmup gradually increases your sending volume over 6 weeks so carriers see your number as trustworthy.
The Warmup Schedule
| Week | Daily Limit |
|---|---|
| 1 | 10 messages |
| 2 | 25 messages |
| 3 | 50 messages |
| 4 | 100 messages |
| 5 | 200 messages |
| 6 | 500 messages |
| After week 6 | Unlimited |
Setting It Up
Go to Warmup in the sidebar, select a device, and toggle it on. You'll see a chart of your sending activity, which week you're in, your current daily limit, and when warmup will finish. You can pause and resume anytime.
What Happens at the Limit
If you try to send more messages than your daily warmup limit, the extra messages are automatically skipped. This applies everywhere — campaigns, dashboard sends, API calls, and automated replies.