Here's a step-by-step guide on how to download and install the APK of GB WhatsApp on an Android device:

1. Open up your Android settings app.

2. Tap 'Security' (or 'Lock screen & security', depending on your version).

3. Look for 'Unknown sources' or something similar, such as 'Install from unknown sources'.

4. Enable this option by tapping the toggle switch next to it until it turns blue/white.

Now that you have enabled installation of apps outside the Play Store, follow these steps:

1. Go back into your phone's main menu.

2. Tap on 'Browser' (or whatever browser app you use).

3. Type in https://gbwhatsapp.pro and press Enter.

4 If prompted by a pop-up window asking whether to open this link using GBWhatsApp, tap Yes or Open.

5 Wait for the download process to complete - depending upon your internet connection speed, it could take anywhere longer than one minute but usually takes less than 10 seconds at most!

6 Once downloaded successfully without any issues encountered during installation like 'Permission denied' errors etc., proceed as follows:

a) Go back home screen by swiping leftwards then tapping on the app icon labeled 'Downloads'.

b) Find and long press over GBWhatsApp.apk until an options menu appears above it says more_vert | Info

c) Select 'Install'

After installing, you will see two versions of WhatsApp - original & modded (GB). To use only one version at any given time:

1 Open Settings > Apps & notifications > See all apps.

2 Find GBWhatsApp from the list and long press on its icon until a context menu appears.

3 Tap 'Uninstall updates'.

Your device should now be back to using just regular WhatsApp.

Gb whatsapp 2018 new version download