WhatsApp asks for a six-digit code when registering a phone number, reinstalling the app, or moving to a new phone. If the code never arrives or is rejected, the cause is usually number formatting, SMS delivery, expiration, or confusion with a two-step PIN.
Does this affect you?
Use this for WhatsApp on iPhone or Android when registering a number for the first time, reinstalling WhatsApp, or switching phones.
If the code never arrives
Check delivery basics before requesting repeatedly.
- Confirm the country code and phone number are correct on the registration screen.
- Make sure the phone has cellular signal and Airplane Mode is off.
- Wait a few minutes because carrier delivery delays are common.
- Use the Call me option when WhatsApp makes it available. The automated call reads the code aloud.
- Check whether the carrier blocks short-code texts, especially on prepaid or business plans.
- Temporarily disable call-blocking, SMS filtering, or spam-filter apps and try again.
If WhatsApp says the code is wrong
Use the newest code and make sure you are not entering a PIN instead.
- Enter the six-digit code exactly as received, with no extra spaces.
- Use the newest text message, not an older code in the thread.
- If several minutes passed, request a fresh code instead of retyping the old one.
- If WhatsApp asks for a PIN, that is Two-Step Verification, not the SMS code.
- If you forgot the PIN, tap Forgotten PIN and reset by email if you added a recovery email.
- After the waiting period or email reset, complete registration with the SMS code.
More control
Add a recovery email for the PIN
Settings > Account > Two-step verification lets you add an email address. It is the shortcut around the long wait if you forget the PIN.
Save the PIN
A two-step PIN is easy to forget because you rarely type it. Keep it in a password manager.
Prepare before switching phones
Before moving a SIM or number, make sure SMS and calls are not blocked by carrier settings or filtering apps.
Avoid rapid repeated registration
Registering the same number many times in a short period can trigger extra WhatsApp delays. If you are switching phones once, wait out the timer instead of hammering requests.
Sources
- WhatsApp FAQ – I did not receive my verification code (2025)
- WhatsApp FAQ – About two-step verification (2025)
- WhatsApp FAQ – Registering your phone number with WhatsApp (2025)