Why SMS Verification Codes Don't Arrive

SMS verification codes are used by apps and websites to confirm that a phone number belongs to you. Sometimes the code does not arrive immediately, or it may be blocked by the carrier, the device, or the service sending it.

Common reasons SMS codes do not arrive

• The phone number was typed incorrectly
• The SMS is delayed by the mobile carrier
• The message is filtered as spam
• The phone blocks unknown senders
• The number is VoIP or virtual and the service does not accept it
• The destination country or carrier blocks verification messages
• The app has reached a rate limit after too many resend attempts

What to check first

• Check that the number is written in international format, for example +1xxxxxxxxxx
• Wait a few minutes before requesting a new code
• Check Spam, Blocked Messages, Unknown Senders, or SMS filters
• Restart your phone if messages are delayed
• Try mobile network instead of Wi-Fi calling if available
• Contact your carrier if OTP messages are blocked

Why some apps reject virtual numbers

Some services may block VoIP, virtual or temporary numbers for verification. This depends on the app, the country, the carrier and the fraud prevention rules used by that platform.

Using GhostNumber

GhostNumber helps users keep their personal number private with virtual numbers for calls and SMS where supported. SMS delivery may still depend on carrier rules, country restrictions and the app receiving or sending the verification message.

Need help?

If your verification code does not arrive, try again later or use a different mobile number.

Visit GhostNumber