We use Facebook Account Kit for our SMS code verification. Unfortunately, we have no control over whether it works or not. With that said, we want it to work as much as you do. Here are a few tips that may help:
- Try the fail-safe (noted on this article).
- Make sure you have “United States (+1)” selected (assuming your phone is, indeed, a U.S. number)
- Only use numbers, don’t start with 1 or +1
- Ensure your device is subscribed to a texting plan and can receive short-code messages. This one sounds obvious, but we’ve had a few instances where users (and even one of our own developers!) had short-code text messages auto-disabled through their carrier. If you aren’t receiving activation codes, it could be worth a call to your carrier to ensure you’re supported.
Please do try option number four if the other options don't work. It is usually the issue.