If WhatsApp says “We couldn’t send an SMS to your number. Please check your number and try again in 1 hour,” the problem is usually related to phone-number formatting, your ability to receive SMS, network conditions, or a temporary verification restriction. Check your number and SIM first, wait for the verification timer, then retry using WhatsApp’s available verification options.
This error can be frustrating, especially when you need WhatsApp for personal communication or your business. The good news is that you can work through several checks before considering more drastic steps such as reinstalling the app.
What Does “We Couldn’t Send an SMS to Your Number” Mean on WhatsApp?
The message means WhatsApp was unable to complete the SMS verification process for the number you entered.
When registering WhatsApp, you need access to the phone number you’re trying to register because WhatsApp uses a verification code to confirm ownership. You must be able to receive SMS messages or, where available, a verification call.
The error does not automatically mean your WhatsApp account is permanently blocked.
Possible causes include:
- An incorrectly entered phone number
- Incorrect country code
- A leading zero entered incorrectly
- Weak or unavailable mobile service
- Problems receiving SMS on your SIM
- Repeated verification attempts
- Temporary verification restrictions
- An outdated WhatsApp installation
- Phone or app settings interfering with verification
How to Fix “We Couldn’t Send an SMS to Your Number” on WhatsApp
1. Check your Ghana phone number carefully
If you’re registering a Ghanaian number, select Ghana (+233) and enter the number in the international format WhatsApp expects.
For example, if your local number begins with 024..., you generally enter it as:
+233 24…
Do not add the local leading 0 after selecting the Ghana country code. WhatsApp’s guidance says leading zeros or special calling codes can cause registration problems.
Double-check every digit before requesting another code.
2. Make sure your SIM can receive SMS
Before blaming WhatsApp, test the SIM itself.
Ask someone to send you a normal SMS. You can also try sending an SMS from your phone.
If ordinary SMS messages aren’t arriving, the problem may be with your mobile network or SIM rather than WhatsApp.
For Ghanaian users, this could involve a SIM on networks such as MTN, Telecel or AirtelTigo.
3. Check your mobile connection
WhatsApp needs an active internet connection during registration, while the verification process also depends on your phone being able to receive the verification message or call.
Try:
- Turn mobile data off and on.
- Check that you have network coverage.
- Temporarily switch between Wi-Fi and mobile data.
- Turn Airplane Mode on for a few seconds, then turn it off.
- Restart your phone.
WhatsApp specifically recommends checking that you can send and receive SMS and that your phone has a working connection when registering.
4. Don’t keep requesting codes repeatedly
If WhatsApp tells you to try again in one hour, don’t repeatedly request another code before the waiting period ends.
Repeated attempts can make the verification process more difficult because WhatsApp may temporarily limit verification requests.
Instead, allow the timer to finish and then make another careful attempt.
Also, never guess the six-digit verification code. Only use a code actually sent to you by WhatsApp.
5. Try the phone-call verification option
Depending on your device, account and what WhatsApp currently offers during registration, you may see an option to verify by phone call.
WhatsApp provides voice-call verification in supported circumstances. The automated call provides the verification code you need to enter in the app.
If the SMS isn’t arriving, look for an option such as “Didn’t receive a verification code?” and check whether a call option is available.
6. Restart your phone
A simple restart can clear temporary network or application issues.
After restarting:
- Confirm your SIM is active.
- Check mobile network coverage.
- Open WhatsApp.
- Enter your number correctly.
- Request verification only when the timer allows it.
This is worth trying before deleting WhatsApp or changing other phone settings.
7. Update or reinstall WhatsApp
Make sure you’re using the latest official version of WhatsApp from the Google Play Store or Apple App Store.
If the installation appears damaged or behaves unusually, you can consider uninstalling and reinstalling the official app.
Important: Before deleting WhatsApp, make sure you understand what will happen to locally stored chats and confirm that any backup you need is available. Don’t clear WhatsApp data simply because a verification SMS isn’t arriving.
8. Check whether your number is supported
WhatsApp has restrictions around the types of numbers that can be registered.
For example, WhatsApp says unsupported numbers can include VoIP, toll-free, premium-rate and certain other number types. Landlines are supported through the WhatsApp Business app under the appropriate registration process.
If you’re trying to register a normal Ghanaian mobile number, verify that the number is active and belongs to you.
Should You Clear WhatsApp Cache or Data?
Clearing cache can sometimes help with an app behaving incorrectly, but it isn’t a guaranteed solution for an SMS verification problem.
On Android, you can usually find WhatsApp under:
Settings → Apps → WhatsApp → Storage
If available, clearing the cache is a relatively low-risk troubleshooting step.
Be more careful with Clear Data/Storage. It can remove locally stored application information and may require you to set the app up again.
For a verification problem, start with your phone number, SIM, network and WhatsApp’s verification process before deleting application data.
What If the Problem Still Isn’t Fixed?
If you’ve checked your number, confirmed that your SIM receives SMS, waited for the verification timer and tried the available verification methods, the issue may require WhatsApp’s support process.
Keep the following information ready:
- Your phone number with the country code
- Your phone model
- Android or iOS version
- WhatsApp version
- The exact error message
- Whether normal SMS works on your SIM
- Whether the verification-call option appears
Don’t share your WhatsApp verification code with anyone claiming they can “activate” or “recover” your account.
WhatsApp warns users never to share their six-digit registration code because someone who obtains it may be able to register the number on another device.
Quick Fix Checklist
| Problem | What to try |
|---|---|
| Wrong number format | Select Ghana (+233) and remove the leading 0 |
| SMS not arriving | Test normal SMS on your SIM |
| Weak network | Move to an area with better reception |
| Internet problem | Switch between Wi-Fi and mobile data |
| Too many attempts | Wait for the verification timer |
| SMS unavailable | Check whether phone-call verification is offered |
| App problem | Update or reinstall the official WhatsApp app |
| Unsupported number | Use a supported mobile number |
| Still failing | Contact WhatsApp support |
For Businesses: Don’t Let a WhatsApp Problem Stop Your Marketing
For Ghanaian businesses, WhatsApp is often connected to customer enquiries, sales conversations and advertising campaigns.
If you’re running Facebook or Instagram advertising, your WhatsApp setup should be tested before launching campaigns. A customer who clicks an advert expecting to start a conversation should be able to reach the business without unnecessary friction.
GIET can help businesses build and manage campaigns that connect Facebook and Instagram advertising with customer conversations, while also helping you understand how your digital campaigns should be structured.
If your goal is to generate enquiries rather than simply get views, learn more about our Facebook and Instagram advertising services.
Final Thoughts
The “We couldn’t send an SMS to your number. Please check your number and try again in 1 hour” WhatsApp error is usually best approached systematically.
Start by checking your Ghana phone-number format and making sure your SIM can receive SMS. Then check your network and internet connection, wait for the verification timer instead of repeatedly requesting codes, and use the available call-verification option if WhatsApp offers it.
Most importantly, never share your WhatsApp verification code with another person. If the problem continues after the basic checks, use WhatsApp’s official support channels rather than paying an unknown person who promises to bypass verification.
For businesses that depend heavily on WhatsApp leads, fixing the account is only one part of the process. Your advertising, targeting and customer journey also need to work together.
Having trouble turning WhatsApp into a reliable source of customer enquiries? GIET can help you build and improve Facebook and Instagram campaigns designed to generate meaningful conversations with potential customers.
Explore GIET’s Facebook & Instagram Ads services or book a call with GIET to discuss your business goals.
FAQs
It means WhatsApp couldn’t complete the SMS verification process for the phone number you entered. Check the number format, SIM reception, SMS service, internet connection and verification timer.
Select Ghana (+233), enter your number without the local leading zero, confirm that your SIM can receive SMS, check your network connection and wait until WhatsApp allows another verification attempt.
In supported situations, WhatsApp may provide verification through a phone call. The exact options available can depend on your device and registration circumstances.
Not necessarily. Start by checking your number, SIM, network and verification timer. If you do reinstall WhatsApp, use the official version and make sure you understand your backup situation first.
The message indicates that WhatsApp is temporarily preventing or delaying another verification attempt. Waiting for the indicated period before trying again is preferable to repeatedly requesting codes.
Your verification code is intended for you. Never give it to another person. WhatsApp says that users should never share their six-digit registration code.
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