How to Fix Viber Not Sending Messages

Viber can sometimes fail to send messages, showing a red exclamation mark or keeping messages stuck in a sending state. Here are all the methods to fix this issue and get your Viber messages delivered.

Method 1: Check Your Internet Connection

Viber requires an active internet connection to send and receive messages. A weak or disconnected network is the most common cause of this problem.

1. Open your web browser and try loading any website to confirm your internet is working.
2. If you are on Wi-Fi, try switching to mobile data or vice versa.
3. Toggle Airplane mode on for 10 seconds, then turn it off to refresh your connection.
4. Restart your router if you are using Wi-Fi.

Method 2: Restart the Viber App

Force closing and reopening Viber clears temporary glitches in the app.

1. On Android: Go to Settings, then Apps, find Viber, and tap Force Stop.
2. On iPhone: Swipe up from the bottom of the screen (or double-click the Home button), find Viber, and swipe it away.
3. Wait a few seconds and open Viber again.
4. Try sending your message.

Method 3: Check Viber Server Status

Viber’s servers occasionally experience outages that prevent messages from being sent.

1. Visit downdetector.com and search for “Viber.”
2. Check if other users are reporting similar issues.
3. If there is an active outage, wait for Viber to fix the issue on their end.

Method 4: Clear Viber Cache

Corrupted cache files can cause Viber to malfunction and fail to send messages.

1. On Android: Go to Settings, then Apps, then Viber, then Storage, and tap Clear cache.
2. On iPhone: You will need to uninstall and reinstall the app to clear the cache (covered in Method 7).
3. Open Viber and try sending a message.

Method 5: Update Viber

Running an outdated version of Viber can cause compatibility issues with the messaging servers.

1. Open the Google Play Store (Android) or App Store (iPhone).
2. Search for “Viber.”
3. If an Update button is available, tap it to install the latest version.
4. Open Viber and try sending a message.

Method 6: Check Date and Time Settings

Incorrect date and time settings on your phone can cause authentication issues with Viber servers.

1. Go to your phone’s Settings, then Date & time (or General, then Date & Time on iPhone).
2. Enable Set automatically or Use network-provided time.
3. Restart Viber and try sending a message.

Method 7: Reinstall Viber

A complete reinstall removes all corrupted files and gives you a fresh installation. Make sure to back up your chats first.

1. Open Viber and go to Settings, then Account, then Viber Backup to save your chat history.
2. Uninstall Viber from your phone.
3. Reinstall Viber from the Google Play Store or App Store.
4. Open Viber and verify your phone number.
5. Restore your chat backup when prompted.
6. Try sending a message.

Method 8: Check if the Contact Blocked You

If you can send messages to other contacts but not a specific person, that contact may have blocked you on Viber.

1. Try sending a message to a different contact to confirm the app is working.
2. If messages to other contacts go through, the issue is specific to that one contact.
3. Signs you may be blocked include: messages only showing one check mark (sent but not delivered), you cannot see the contact’s online status, and calls do not go through.