If you’re seeing a 304 or 307 texting error, here’s how to diagnose and fix it.
⚠️ Error 304 — Message Not Delivered
This means the text didn’t reach your contact. Common causes include:
📵 The recipient is out of service or their phone is turned off.
☎️ The number is a landline (not able to receive texts).
🚫 A carrier restriction is blocking delivery.
How to Fix:
✅ Confirm the number is a cell phone, not a landline.
📶 Make sure the contact’s phone is in service.
💬 Have the contact text START (just that word) in the same conversation thread.
This tells the carrier they want to receive messages again.
Following these steps typically resolves most 304 errors.
If the issue continues, it may be a carrier-side restriction outside your control.
🚧 Error 307 — Message Filtered by Carrier
A 307 error means the carrier (often T-Mobile) blocked or filtered out your message.
Common Triggers:
Use of numbers, #, or $ symbols
Multiple punctuation marks (like “!!!”)
All caps words
Links in the message
How to Fix:
📝 Remove or simplify any of those elements.
🔢 Spell out numbers (e.g., write “twenty-one” instead of “21”).
📧 Send links via email instead of text.
After cleaning up your message, try resending — this usually clears up the 307 error.
💡 Tip:
If you continue to see texting errors after following these steps, please reach out to Support for additional troubleshooting.