WhatsApp Messages Not Sending — What Causes It & How to Fix It

What Does This Error Mean?

One grey tick (or a clock icon) means your message hasn't left your phone yet. This is almost always a connection problem on your end. Checking your internet connection is the first step.

Affected Models

WhatsApp on Android
WhatsApp on iPhone
WhatsApp on Windows
WhatsApp Web

Common Causes

No internet connection — Wi-Fi or mobile data is down
WhatsApp servers are temporarily down
The recipient has blocked you
The contact has deleted their WhatsApp account
Your phone's date and time settings are incorrect

How to Fix It

Check that Wi-Fi or mobile data is working.

Open a website or another app to confirm your internet is connected. WhatsApp needs an active connection to send.
Check the WhatsApp status page.

Visit downdetector.com/status/whatsapp to see if WhatsApp is having a wider outage.
Try sending a message to a different contact.

If other messages send fine, the issue may be specific to that one contact — they may have blocked you or deleted their account.
Check your phone's date and time settings.

Go to Settings > General > Date & Time (iPhone) or Settings > General Management > Date and Time (Android). Enable 'Set Automatically'.
Restart WhatsApp and try again.

Close the app completely and reopen it. This refreshes the connection to WhatsApp's servers.

When to Call a Professional

If messages won't send to anyone and your internet works fine, contact WhatsApp support through the app. Go to Settings > Help > Contact Us.

Frequently Asked Questions

What does one grey tick mean on WhatsApp?

One grey tick means the message has been sent from your phone but not yet delivered to the recipient. It's sitting on WhatsApp's servers, waiting for the recipient's phone to come online. Two grey ticks mean delivered. Two blue ticks mean the recipient has read it.

Does one grey tick mean I've been blocked?

Not necessarily — it can also mean the recipient has no internet, or their phone is off. If you're consistently getting one tick only with one specific contact, blocking is possible. But you cannot know for certain — WhatsApp doesn't notify you when you're blocked.

Why do some messages send but others don't?

If only messages to one contact fail, they may have blocked you, deleted WhatsApp, or lost their number. If messages to everyone fail, it's a connection problem on your device. Try sending to multiple contacts to identify the pattern.