One grey tick. Or no tick at all. You sent the message, WhatsApp shows it in the chat, but it is not going anywhere.
WhatsApp not sending messages is one of the most searched phone problems in the world — and for good reason. When you need to reach someone urgently, a frozen chat is genuinely stressful. The fix is almost always simple, but you need to know which of several possible causes is actually your problem.
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This guide covers every reason WhatsApp messages fail to send, how to diagnose which one is affecting you, and step-by-step fixes for both Android and iPhone.
Understanding the Tick System — What Each Status Actually Means
Before troubleshooting, it helps to understand exactly what WhatsApp’s ticks are telling you:
| Status | What It Means |
|---|---|
| ⏱️ Clock icon | Message is queued — WhatsApp cannot connect to send it yet |
| ✓ One grey tick | Message sent from your device and reached WhatsApp’s servers |
| ✓✓ Two grey ticks | Message delivered to the recipient’s device |
| ✓✓ Two blue ticks | Message has been read by the recipient |
If you are seeing the clock icon or one grey tick that never progresses, the problem is between your phone and WhatsApp’s servers — almost always a connectivity or app issue. If you are seeing two grey ticks that never turn blue, that is a different situation (the recipient has received the message but not read it — or has read receipts turned off).
This guide focuses on messages that are stuck at the clock or one grey tick — meaning they are genuinely failing to send.
The 8 Reasons WhatsApp Messages Fail to Send
1. No Internet Connection or Unstable Connection
The most common cause by a significant margin.
WhatsApp requires an active internet connection to send every message. If your connection drops, slows to an unusable speed, or switches unexpectedly between Wi-Fi and mobile data, messages will queue and stop sending.
How to diagnose it:
Open a browser and try to load a website. If it loads slowly or not at all, your internet connection is the problem. Alternatively, check your status bar — if you see no signal bars or a “No Internet” indicator, you have found your issue.
How to fix it:
On mobile data:
- Turn mobile data off and back on: pull down your notification bar and toggle mobile data
- If signal is weak, move to a location with better coverage
- Try switching from 5G to 4G: Settings → Network → Mobile Network → Preferred Network Type → select 4G/LTE
On Wi-Fi:
- Turn Wi-Fi off and back on
- Move closer to the router if signal is weak
- Restart your router (unplug it, wait 30 seconds, plug back in)
- Try switching to mobile data to test whether the Wi-Fi is the specific problem
On both Android and iPhone:
Toggling Airplane Mode on for 10 seconds and then off again resets all radio connections simultaneously and often resolves temporary connectivity glitches faster than toggling individual settings.
2. Airplane Mode Is Enabled
Simple but easy to miss — especially if someone else used your phone.
When Airplane Mode is active, all wireless connections are disabled. WhatsApp will appear to function normally — you can open chats and type messages — but nothing will send.
How to fix it:
Android: Pull down the notification shade → tap the Airplane Mode icon to disable it.
iPhone: Open Control Centre (swipe down from top right) → tap the airplane icon to disable it.
Wait a few seconds after disabling Airplane Mode for your connections to re-establish, then check if messages send.
3. WhatsApp Server Outage
Not your problem — but important to rule out before spending time troubleshooting your device.
WhatsApp’s servers occasionally go down. When they do, nobody can send messages — not you, not anyone. These outages are usually brief (minutes to an hour) but they do happen.
How to diagnose it:
Visit downdetector.com/status/whatsapp in your browser. If there is a current outage, you will see a spike in reported problems and a confirmation that WhatsApp is aware of the issue.
You can also check WhatsApp’s official Twitter/X account (@WhatsApp) for service announcements.
How to fix it:
You cannot fix a server-side outage. Wait it out. Messages that failed to send during an outage will usually send automatically once service is restored — you do not need to resend them manually.
4. Outdated Version of WhatsApp
An old app version can cause sending failures, especially after WhatsApp pushes a required update.
WhatsApp periodically releases updates that include bug fixes and security patches. Older versions may lose functionality as the platform evolves — including the ability to send messages in some cases. WhatsApp also formally ends support for very old app versions after giving advance notice.
How to fix it:
Android:
Open the Play Store → tap your profile icon (top right) → Manage Apps & Device → check if WhatsApp has an update available → tap Update.
iPhone:
Open the App Store → tap your profile icon (top right) → scroll down to see available updates → update WhatsApp if listed.
After updating, restart WhatsApp and try sending again.
Note: If WhatsApp does not appear in your available updates, you are already on the current version — move to the next cause.
5. Background Data or App Permissions Restricted
A setting change or battery optimisation feature may be preventing WhatsApp from connecting in the background.
Many Android phones include battery optimisation features that restrict what apps can do when running in the background. If WhatsApp is being optimised aggressively, it may not be able to maintain its connection to send messages unless the app is actively open on your screen.
Similarly, if WhatsApp’s data permissions have been restricted — either manually or by a data-saving mode — it will be unable to send.
How to fix it on Android:
For background data:
Settings → Apps → WhatsApp → Data Usage → enable “Allow Background Data Usage” and disable “Restrict Background Data.”
For battery optimisation:
Settings → Battery → Battery Optimisation (or “App Battery Management”) → find WhatsApp → select “Don’t Optimise” or “No Restrictions.”
For data saver mode:
If your phone has Data Saver enabled, WhatsApp may be blocked from using background data. Settings → Network → Data Usage → Data Saver → add WhatsApp to the “Unrestricted Apps” list.
On iPhone:
Settings → WhatsApp → ensure “Background App Refresh” is enabled. Settings → Mobile Data → scroll to WhatsApp → ensure it is toggled on.
6. WhatsApp Cache Corrupted (Android)
A corrupted cache can cause WhatsApp to behave erratically — including failing to send messages.
The cache is temporary data that WhatsApp stores on your phone to load faster. Over time, cache data can become corrupted or overly large, causing the app to malfunction. Clearing it does not delete your messages, photos, or contacts — it only removes temporary files.
How to fix it (Android only — iPhone manages cache automatically):
Settings → Apps → WhatsApp → Storage → tap “Clear Cache.”
Do not tap “Clear Data” unless you want to log out of WhatsApp and lose locally stored media. Clear Cache only.
After clearing the cache, open WhatsApp and try sending a message.
7. WhatsApp Needs to Be Force-Stopped and Restarted
Sometimes WhatsApp gets stuck in a state where simply closing and reopening it is not enough.
If WhatsApp is frozen or has encountered an internal error, force-stopping it completely clears the stuck state.
How to force-stop on Android:
Settings → Apps → WhatsApp → tap “Force Stop” → confirm → reopen WhatsApp from your home screen.
On iPhone:
Swipe up from the bottom of the screen (or double-press the Home button on older models) to see open apps → swipe WhatsApp upward to close it completely → reopen from your home screen.
8. Your Phone’s Date and Time Are Incorrect
This one surprises people — but an incorrect date or time on your phone can prevent WhatsApp from connecting to its servers.
WhatsApp’s servers use time synchronisation for security. If your phone’s clock is significantly off from the real time, the handshake between your device and WhatsApp’s servers can fail.
How to fix it:
Android: Settings → General Management (or System) → Date and Time → enable “Automatic Date and Time.”
iPhone: Settings → General → Date & Time → enable “Set Automatically.”
Once your phone’s clock syncs to the correct time, reopen WhatsApp and test.
Step-by-Step: The Fastest Way to Fix WhatsApp Not Sending
If you want a quick sequence to run through rather than diagnosing each cause individually, do these in order:
Step 1: Toggle Airplane Mode on for 10 seconds, then off. Wait for connections to restore.
Step 2: If no improvement, turn Wi-Fi or mobile data off and back on.
Step 3: Check downdetector.com/whatsapp to rule out a server outage.
Step 4: Force-stop WhatsApp and reopen it.
Step 5: Clear WhatsApp’s cache (Android) or restart your phone entirely.
Step 6: Check for a WhatsApp update in the Play Store or App Store.
Step 7: Check background data and battery optimisation settings.
Step 8: Verify your phone’s date and time are set to automatic.
In the majority of cases, the problem is resolved by Step 2 or Step 4.
Frequently Asked Questions
Why does WhatsApp show one tick but not two?
One tick means the message reached WhatsApp’s servers but has not been delivered to the recipient’s device. This usually means the recipient’s phone is off, they have no internet connection, or they have blocked you. If you have been blocked, you will also notice you cannot see their profile photo or Last Seen status.
Why are my WhatsApp messages delayed but eventually sending?
Delayed sending usually points to an intermittent internet connection — your phone loses signal briefly, queues the message, and sends it when connection is restored. Check your signal strength and consider switching between Wi-Fi and mobile data to find the more stable option.
Will clearing WhatsApp cache delete my messages?
No. Clearing the cache removes temporary files only. Your chat history, contacts, and media are not affected. Your messages are also backed up to Google Drive (Android) or iCloud (iPhone) if you have backup enabled.
My internet works for other apps but not WhatsApp — why?
This points to a WhatsApp-specific issue rather than a general connectivity problem. The most likely causes are: WhatsApp’s background data being restricted, a corrupted cache, an outdated app version, or — rarely — a server issue affecting WhatsApp specifically. Work through steps 4 through 8 above.
I have tried everything and WhatsApp still will not send messages. What next?
Uninstall WhatsApp completely and reinstall it from the Play Store or App Store. Before doing this, ensure your chat backup is up to date: WhatsApp → Settings → Chats → Chat Backup → Back Up Now. A clean reinstall resolves issues that persist through cache clearing and updates.
WhatsApp not sending messages is almost always a connectivity or app configuration issue — not a hardware fault and not something that requires a technician. The steps above cover every known cause. Work through them in order and your messages will be sending again within minutes.
Last updated: April 22 2026
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