Please make sure you have a strong signal and a working internet connection on your phone.

Make sure your phone has an internet connection. You can check this by opening a browser and going to a website.

If web pages work, but WhatsApp doesn't, you will need to contact your mobile provider and system administrator and make sure that your APN and router are configured correctly to allow non-web and socket connections.

You may just need to change the notification settings in WhatsApp:

1. Open WhatsApp.
2. Push the [Menu Button].
3. Tap Settings > Notifications.

In this menu, you have options for Message Notifications, Group Notifications, and Broadcast Notifications. Adjust the settings to your liking.

Are messages still taking too long to reach your phone?

It may be that you are not receiving your message pushes from Google's push service.

We recommend that you:

• Reboot the phone (Turn it OFF then ON).
• Delete and reinstall WhatsApp.
• Make sure that [Background data] is allowed under Settings > Data Usage > [Menu Button].
• Launch the (Google) Talk app, press the [Menu Button], and select [Sign out] for all of your accounts. Then re-launch (Google) Talk and sign back in to your account(s).
• Turn off Wi-Fi.
• If you are often connected to Wi-Fi, check your Wi-Fi sleep policy (Settings > Wi-Fi > [Menu Button] > Advanced > [Keep Wi-Fi on during sleep]) and make sure it is set to "Always".
• For HTC devices, try turning off fast boot in [Menu Button] > Settings > Power > Fast Boot. If your Android OS is 2.3 and you have Power Mode set to "Economy," go to Settings > Power > Economy mode settings > uncheck the [Disable background data] option, then reboot your phone again.
• Make sure to uninstall any task killers, these will keep the app from receiving messages when you are not in the app.
  • If you have no idea what a task killer is, then you probably don’t have one.

Cheers,
WhatsApp Support Team