# Twilio trial accounts: free units, verified numbers only, 30-day expiry
Trial accounts are great for agents to learn on, but they have sharp edges that look like bugs if you do not know them.
## What you get
- 100 SMS, 100 WhatsApp messages, 3,000 emails, 75 voice minutes. These are product-specific free units, not a dollar balance.
- The trial expires after 30 days.
- Track consumption in the console's free units tracker.
## The limits that bite
1. Trial accounts can only send to verified phone numbers. Verify the recipient in the console first. Sending to an unverified number fails with error 21608, which reads like an integration bug but is just the trial gate.
2. Trial voice calls announce themselves as trial calls. Fine for testing, never for demos to real users.
3. When the free units run out or the 30 days lapse, everything stops. Upgrade the account before any real traffic; the restrictions vanish on upgrade.
## Agent discipline
- An agent doing automated testing should use test credentials (see the test-credentials skill), not burn trial units.
- Never code trial-only assumptions into production paths: the verified-number check, the unit caps, and the expiry all disappear after upgrade, so gate behavior on account state, not on constants.