If WhatsApp messages are stuck on one grey tick — or show a clock icon instead of ticks — your message is not reaching WhatsApp's servers. This is almost always caused by an unstable internet connection, battery or data restrictions blocking WhatsApp in the background, or an app-level issue like corrupted cache.
On Samsung, Xiaomi, and OnePlus devices running Android 14 and Android 15, background data restrictions and battery optimisation have become the most commonly reported causes of WhatsApp messages not sending. Start with Fix 1 — it resolves the issue for most users immediately.
Fast Fix — Try This First
If you are in a hurry, do these three things before anything else:
- Toggle Aeroplane Mode — on for 10 seconds, then off
- Set WhatsApp battery to Unrestricted — Settings → Apps → WhatsApp → Battery → Unrestricted
- Enable background data — Settings → Apps → WhatsApp → Mobile data → Background data → On
These three steps fix WhatsApp not sending messages for the majority of Android users. If messages are still stuck after this, continue with the full fixes below.
Understanding WhatsApp Tick System
Before fixing anything, confirm what you are seeing. WhatsApp messages stuck on sending, pending clock icon, or not delivering all have different causes:
| What You See | What It Means |
|---|---|
| Clock icon / pending icon | Message not yet sent — no server connection |
| Single grey tick | Sent to WhatsApp servers, not yet delivered to recipient |
| Double grey tick | Delivered to recipient's phone |
| Double blue tick | Read by recipient |
If you see a clock icon or pending icon, the problem is on your end — your phone cannot reach WhatsApp's servers. The fixes below will resolve WhatsApp messages not delivering on Android. If you see a single grey tick, the issue may be on the recipient's side — their phone may be off or they may have blocked you.
Table of Contents
- Fix 1: Check Your Internet Connection
- Fix 2: Disable Airplane Mode
- Fix 3: Enable Background Data for WhatsApp
- Fix 4: Disable Battery Optimization for WhatsApp
- Fix 5: Disable Data Saver
- Fix 6: Check if You Are Blocked
- Fix 7: Check if WhatsApp Is Down
- Fix 8: Clear WhatsApp Cache
- Fix 9: Check App Permissions
- Fix 10: Update WhatsApp
- Fix 11: Reset Network Settings
- Frequently Asked Questions
Quick Cause Finder
| What You Experience | Most Likely Cause |
|---|---|
| Clock icon / pending on all messages | No internet connection or WhatsApp server issue |
| WhatsApp messages stuck on one tick only | Message sent but recipient offline or you are blocked |
| Messages not sending on mobile data only | Mobile data blocked for WhatsApp |
| WhatsApp not sending after update | Battery optimization or permissions reset |
| One contact not receiving — others fine | You may be blocked by that contact |
| Sudden failure after working fine | WhatsApp server outage or app cache issue |
| Messages delayed but eventually send | Weak or unstable connection |
How Long Does Each Fix Take?
| Fix | Time Required |
|---|---|
| Check internet connection | 1 minute |
| Disable Airplane Mode | 30 seconds |
| Enable background data | 1 minute |
| Disable battery optimization | 1 minute |
| Disable Data Saver | 1 minute |
| Check if blocked | 2 minutes |
| Check WhatsApp server status | 1 minute |
| Clear WhatsApp cache | 1 minute |
| Check app permissions | 1 minute |
| Update WhatsApp | 2–5 minutes |
| Reset network settings | 3 minutes |
Fix 1: Check Your Internet Connection
This is the most common cause of WhatsApp messages not sending. A clock icon instead of ticks means WhatsApp cannot reach its servers — almost always an internet issue.
Quick checks:
- Open a website or YouTube video — if it loads slowly or not at all, your connection is the problem
- Switch between Wi-Fi and mobile data to see which works
- Turn Wi-Fi off and back on
- Move closer to your router if signal is weak
Test your connection properly: If websites load but WhatsApp still will not send, toggle Airplane Mode on for 10 seconds, then turn it off. This resets your phone's network connection and often resolves temporary connectivity glitches.
If your Android keeps dropping Wi-Fi during use, that is a separate issue covered in the guide on How to Fix Android Wi-Fi Disconnecting.
Fix 2: Disable Airplane Mode
Airplane Mode cuts off all wireless connections — Wi-Fi, mobile data, and Bluetooth. If it was accidentally enabled, WhatsApp cannot send or receive anything.
Check: Swipe down the notification panel and look for the Airplane Mode icon — a plane symbol. If it is highlighted or active, tap it to turn it off.
After disabling Airplane Mode, wait 10-15 seconds for the network connection to re-establish, then try sending the message again.
Fix 3: Enable Background Data for WhatsApp
On Android, apps can be restricted from using mobile data in the background — even when your overall data connection is working. If WhatsApp messages send on Wi-Fi but fail on mobile data, this is almost certainly the cause.
Steps:
- Go to Settings → Apps → WhatsApp
- Tap Mobile data and Wi-Fi
- Enable Background data
- Enable Unrestricted data usage if available
Samsung One UI 7: Settings → Apps → WhatsApp → Mobile data → Allow background data usage → On
Xiaomi/HyperOS (Redmi Note, Poco phones): Settings → Apps → Manage Apps → WhatsApp → Data Usage → enable Background data
After enabling, try sending a message on mobile data. It should go through immediately.
Fix 4: Disable Battery Optimization for WhatsApp
This fix has become increasingly important on Android 14 and Android 15. Aggressive battery optimization pauses WhatsApp's background activity — preventing it from maintaining a server connection and sending messages when the app is not in the foreground.
On Samsung Galaxy devices, Xiaomi Redmi Note and Poco phones, Google Pixel, and OnePlus devices, this is now one of the most common causes of WhatsApp not sending messages — particularly after Android 15 updates.
Real-world failure patterns:
- Xiaomi HyperOS aggressively kills WhatsApp in the background — messages show pending clock icon for minutes before failing entirely
- Samsung One UI 7 resets battery optimization to Optimized after major system updates — causing WhatsApp messages stuck on sending
- Android 15 Data Saver silently blocks WhatsApp background sync on some devices — messages queue but never deliver
Samsung One UI 7: Settings → Apps → WhatsApp → Battery → Unrestricted
On Samsung Galaxy A and S series running One UI 7, users have reported WhatsApp messages getting stuck with a clock icon after switching to another app — setting battery to Unrestricted resolved it immediately.
Xiaomi/HyperOS: Settings → Apps → Manage Apps → WhatsApp → Battery Saver → No restrictions
OnePlus/OxygenOS: Settings → Battery → Battery Optimization → WhatsApp → Don't Optimize
Google Pixel / Stock Android: Settings → Apps → WhatsApp → Battery → Unrestricted
Motorola: Settings → Apps → WhatsApp → Battery → Unrestricted
After setting to Unrestricted, try sending the stuck message again.
If your Android battery drains faster after making this change, the guide on How to Fix Android Battery Draining Fast explains which settings actually impact battery life.
Fix 5: Disable Data Saver
Android's Data Saver restricts background data usage for all apps including WhatsApp. When active, WhatsApp cannot send messages in the background — messages queue up and only send when the app is open in the foreground, and even then may fail for large media.
Check Data Saver: Stock Android: Settings → Network & Internet → Data Saver. Samsung: Settings → Connections → Data Usage → Data Saver
If Data Saver is on, either turn it off entirely or add WhatsApp to the unrestricted apps list: Settings → Network & Internet → Data Saver → Unrestricted data → enable WhatsApp
Fix 6: Check if You Are Blocked
If messages send to everyone else but one specific contact always shows a single grey tick and never delivers, that contact may have blocked you.
Signs you may be blocked:
- Messages to that contact always show single grey tick, never double tick
- Their profile photo and last seen are no longer visible
- Calls to that contact never connect
- You cannot see their status updates
Note: WhatsApp does not send a notification when you are blocked — these are indirect signs only. A single grey tick can also mean the recipient's phone is off or they have no internet connection. The combination of all four signs above suggests blocking.
There is no fix if you are blocked — only the contact who blocked you can unblock you.
Fix 7: Check if WhatsApp Is Down
Occasionally the problem is not your phone — WhatsApp's servers go down and messages fail to send for all users globally.
How to check:
- Visit downdetector.com and search for WhatsApp
- Check WhatsApp's official account on X (Twitter) for outage announcements
- Ask a contact if they can send WhatsApp messages
If WhatsApp is down, there is nothing to fix on your device. Wait 15-30 minutes and try again — server outages are usually brief.
Fix 8: Clear WhatsApp Cache
Corrupted cache files can cause WhatsApp to fail silently when sending messages — particularly after Android updates or WhatsApp version changes.
Steps:
- Go to Settings → Apps → WhatsApp
- Tap Storage
- Tap Clear Cache
- Reopen WhatsApp and try sending again
Do not tap Clear Data — that removes your local messages and chat history. Cache only.
If WhatsApp backup is also causing issues alongside sending problems, the guide on Fixing WhatsApp Backup Stuck on Android covers that separately.
Fix 9: Check App Permissions
WhatsApp requires certain permissions to function properly. If storage or contacts permission was revoked — which can happen silently after Android updates — some WhatsApp functions including message sending can break.
Steps:
- Go to Settings → Apps → WhatsApp → Permissions
- Ensure the following are allowed:
- Contacts — required for sending messages to saved contacts
- Storage / Files and Media — required for sending photos and videos
- Microphone — required for voice messages
Samsung One UI 7: Settings → Apps → WhatsApp → Permissions → Contacts → Allow
Xiaomi/HyperOS: Settings → Apps → Manage Apps → WhatsApp → Permissions → enable Contacts and Storage
After restoring permissions, restart WhatsApp and try sending again.
Fix 10: Update WhatsApp
Outdated WhatsApp versions contain known bugs that cause messages to fail sending. WhatsApp updates regularly — if you have auto-update disabled, you may be running a version with a known messaging issue.
Steps:
- Open Google Play Store
- Search WhatsApp → tap Update if available
- After updating, restart your phone and try sending
If WhatsApp or other apps keep crashing after an update, the guide on How to Fix Android Apps keep Crashing covers that separately.
Fix 11: Reset Network Settings
If all the above fixes have not worked, your phone's network configuration may be corrupted — preventing WhatsApp from establishing a proper connection to its servers even when other apps work.
Resetting network settings restores all Wi-Fi, mobile data, and Bluetooth configurations to default. This will remove saved Wi-Fi passwords and paired Bluetooth devices — reconnect to Wi-Fi networks after the reset.
Stock Android: Settings → System → Reset options → Reset Wi-Fi, mobile & Bluetooth
Samsung One UI 7: Settings → General Management → Reset → Reset Network Settings
Xiaomi/HyperOS: Settings → Additional Settings → Backup and Reset → Reset Network Settings
OnePlus: Settings → Additional Settings → Backup and Reset → Reset network settings
After the reset, reconnect to Wi-Fi and try sending a WhatsApp message.
Testing Methodology
This guide was tested on Samsung Galaxy A55 and Galaxy S24 running One UI 7, Google Pixel running Android 15, Xiaomi Redmi Note running HyperOS, and OnePlus device running OxygenOS. Each fix was verified by reproducing the WhatsApp not sending condition and confirming resolution.
Final Thoughts
For most Android users, WhatsApp messages not sending comes down to three things: an unstable internet connection, background data restricted for WhatsApp, or battery optimization preventing the app from maintaining a server connection. Fix 1, Fix 3, and Fix 4 resolve the issue for the large majority of users.
If you are also experiencing WhatsApp notifications not arriving, that issue is covered in the guide on How to Fix WhatsApp Notifications not Working on Android. And if you run two WhatsApp accounts on one phone, connection issues can affect each account independently — the Two WhatsApp Accounts Guide covers that setup.
Frequently Asked Questions (FAQs)
Why are my WhatsApp messages not sending on Android?
The most common causes are an unstable internet connection, background data restricted for WhatsApp, or battery optimization preventing WhatsApp from maintaining a server connection. Check your internet first, then enable background data in Settings → Apps → WhatsApp → Mobile data and Wi-Fi.
Why does WhatsApp show a clock icon instead of ticks?
A clock icon means the message has not reached WhatsApp's servers yet — your phone has no connection to WhatsApp. Check your internet connection, disable Airplane Mode if active, and ensure background data is enabled for WhatsApp.
Why do WhatsApp messages send on Wi-Fi but not mobile data?
WhatsApp's mobile data access is likely restricted. Go to Settings → Apps → WhatsApp → Mobile data and Wi-Fi and enable Background data and Unrestricted data usage. Also check if Data Saver is blocking WhatsApp's background connection.
How do I know if someone blocked me on WhatsApp?
Signs include messages always showing single grey tick to that contact, their profile photo and last seen no longer visible, calls never connecting, and no status updates from them. WhatsApp does not officially confirm blocks — these are indirect signs only.
Why did WhatsApp stop sending messages after an Android update?
Android updates can reset background data permissions and battery optimization settings for apps. After an update, check Settings → Apps → WhatsApp → Battery is set to Unrestricted, and Settings → Apps → WhatsApp → Mobile data has background data enabled.
Can battery optimization stop WhatsApp from sending messages?
Yes. On Android 14 and Android 15 especially, battery optimization can prevent WhatsApp from maintaining a server connection in the background. Set WhatsApp to Unrestricted in Settings → Apps → WhatsApp → Battery.
What does single grey tick mean on WhatsApp?
A single grey tick means your message was successfully sent from your phone to WhatsApp's servers, but has not been delivered to the recipient's device yet. This usually means the recipient's phone is off, they have no internet connection, or they have blocked you.
How do I fix WhatsApp messages stuck on sending?
Try these in order: check your internet connection, toggle Airplane Mode off and on, enable background data for WhatsApp in Settings → Apps → WhatsApp → Mobile data, and set battery optimization to Unrestricted. Clear WhatsApp cache if the issue persists.
Does Data Saver affect WhatsApp message sending?
Yes. Android's Data Saver restricts background data for all apps including WhatsApp. When active, WhatsApp cannot send messages reliably in the background. Turn off Data Saver or add WhatsApp to the unrestricted apps list.
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