## TL;DR

Upgrade the account before any real traffic; the restrictions vanish on upgrade. When the free units run out or the 30 days lapse, everything stops.

## Steps

1. - 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.

## When to use

You are seeing this: Trial accounts are great for agents to learn on, but they have sharp edges that look like bugs if you do not know them. Use this skill when you run into "Twilio trial accounts: free units, verified numbers only, 30-day expiry".

## When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

## Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

## Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.