If your WhatsApp code was not received, work through the fixes below in order. Check the number format, wait for the timer, request the code once more, then ask for a phone call. Most missing codes come down to one of three things: the number was typed wrong, WhatsApp is making you wait, or the phone that should receive the code is offline. This guide covers each one, what the “phone number not valid” error usually means, and who to contact if you are still stuck.
The TripoSIM US number receives verification codes from apps, including WhatsApp and WhatsApp Business. TripoSIM tested WhatsApp on October 13, 2026 and WhatsApp Business on October 18, 2026. So if you are using it, the fixes below are about getting the code to reach you, not about the number itself.
Why isn’t my WhatsApp code arriving?
Find your symptom in the table, then use the step-by-step list below.
| Symptom | Likely cause | Fix |
|---|---|---|
| No SMS after a few minutes | Timer still running, or the app is offline | Wait for the timer, check the app is online, then request again once |
| “Not valid” or “not a US number” | Wrong format or wrong country picked | Choose United States (+1), then type the 10 digits only |
| “You have guessed the code too many times” | Too many wrong entries | Wait the full time. It can’t be shortened |
| Call comes, but you miss it | Notifications or microphone off, or no answer | Allow notifications and the microphone, then request the call again |
| “Login not available right now” | Temporary hold | Wait. Retrying early can restart the hold |
| Codes arrive you didn’t ask for | Someone entered your number | Don’t share the code. Turn on two-step verification |
What are the steps to fix a missing WhatsApp code?
- Check the number format. Pick United States (+1) from the country list, then type the 10-digit number. Leave out any extra 1, leading 0 or exit code.
- Wait for the timer. Stay on the verification screen until the timer finishes. Leaving the screen early can time you out (help center).
- Request the code again, once. When the timer ends, ask for a new SMS code a single time and give it a few minutes.
- Use “Call me”. If the text still hasn’t come, tap Call me. An automated voice reads the 6-digit code (help center). On a TripoSIM number the call rings in the TripoSIM app.
- Check the number is active in the TripoSIM app. Open the app and confirm your number shows there, your plan is active and the phone has Wi-Fi or mobile data. TripoSIM says calls ring even when the app is closed once notifications and the microphone are allowed; a phone that is off, offline or has notifications blocked does not ring, and callers reach voicemail.
- Don’t guess and don’t keep requesting. Wrong guesses and repeated requests add longer waits. If you see “You have guessed the code too many times”, wait for the full time.
- Restart and update. Restart the phone, update WhatsApp and the TripoSIM app, then try once more.
- Contact TripoSIM support. If nothing arrives after these steps, write to [email protected] or use the TripoSIM contact page. Give them your US number and the time you requested the code.
How do you make sure the TripoSIM app receives the code?
The code reaches you inside the TripoSIM app, so the app has to be ready before you start WhatsApp.
- Internet on. Calls and texts need Wi-Fi or mobile data. Open a web page to check.
- Notifications allowed. On iPhone, add the TripoSIM web app to your Home Screen. On Android, install the TripoSIM app. Allow notifications so the text and the call show up.
- Microphone allowed. The “Call me” code comes as a voice call, and the app needs the microphone to answer it.
- Plan active. The number must be showing in the app after your ID check and payment.
Test it before you register: call your US number from another phone and check it rings. For the full setup, see how to set up WhatsApp with a US number.
What does “This phone number is not valid” mean?
Almost always, the format. A missing +1, an extra leading 1 or 0, or the wrong country picked can all make a valid number look invalid. Pick United States, type the 10 digits, and try again. If WhatsApp still won’t take a number you know is active, ask TripoSIM support to confirm the number on your account.
What does “Login not available right now” mean?
WhatsApp calls this a temporary hold. It isn’t about whether your code arrived. Wait it out, because trying again before the hold ends may start a new waiting period (help center). If the screen says the number can’t use WhatsApp, that is about how an account was used, not the code.
When should you contact support?
Contact TripoSIM support when:
- you’ve waited out the timer and tried both SMS and Call me, and nothing arrived;
- the app is online with notifications on, and a test call from another phone doesn’t ring;
- the number doesn’t show in the TripoSIM app after payment.
Support can check the number and your plan. For codes from other apps, see our guide to a US number for verification codes and the app code checker.
Bottom line
Fix the format, wait for the timer, request again once, then use Call me. That solves most missing codes. On a TripoSIM US number, keep the app online with notifications and the microphone allowed, and contact TripoSIM support if the code still doesn’t come. To get a number for WhatsApp, see the plans or read using a US number for WhatsApp.