Symptoms
- Requested code never arrives by text
- Long delay before the code shows up
- Repeated resend requests with no code received
- Weak or no cell signal at the time
Likely causes
- CommonCarrier network delaySMS delivery for automated codes can lag during high traffic periods.
- CommonPhone in low signal or airplane modeCodes can't arrive without an active cellular connection.
- PossibleMessage filtered as spam by the phone or carrierSome phones or carrier spam filters can silently block short automated codes.
- PossibleWrong phone number on fileAn old or mistyped number on the account means codes go to a number you no longer have.
What to do
- Check that your phone has a cellular signal and isn't in airplane or do-not-disturb mode.
- Wait a few minutes, since codes can occasionally be delayed rather than lost entirely.
- Check your phone's spam or blocked messages folder for the code.
- Try requesting the code again, or switch to a phone call or authenticator app option if the service offers one.
- Confirm the phone number on file for the account is correct and current.
- Restart your phone, which can clear a stuck network connection.
- If you consistently have this problem, switch to an authenticator app for that account instead of SMS codes.
When to call a pro
If codes never arrive on any service and the issue is carrier-wide, contact your mobile carrier to check for an SMS delivery block on your line.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.