First check it out you have the latest App of Whatsapp on your device
∆Steps
*.Then go to Settings > Display > Screen Timeout. This option may be different on your phone. But, you have to select the “Screen turns off automatically” option.
*.Now choose “Never” option.
*.Now your mobile screen will never go to sleep, unless you press the lock button.
*.Then switch on the Data network or WiFi as per your need.
*.Then, go to the Whatsapp Application.
*.Now your number stays online.
*.Just leave your mobile in this way. Don’t close the app. Your screen stays on, then your “Last Seen” and also stays online
This is dummy text. It is not meant to be read. Accordingly, it is difficult to figure out when to end it. But then, this is dummy text. It is not meant to be read. Period.