Previously, WhatsApp one of the big social platforms owned under Meta, to use it you would need your two devices the phone and PC to be connected to internet to be able to send and receive information on WhatsApp web, However with the release of a WhatsApp desktop Version, one is able to to use WhatsApp even when their smartphones are not connected to internet, saving data from the apps running in the background such that your activities doesn’t depend on your mobile smartphone state.
With this new technology if your phone in this case the main device remains disconnected for 14 days, you will be automatically logged out of all your linked devices and this feature supports up to four devices that’s WhatsApp web, Desktop app and Portal
Steps On How to use WhatsApp Web without a Smartphone
Step 1: Open WhatsApp on your phone and tap on the three-dotted icon, located on the top right corner of the WhatsApp screen to display Options.
Step 2: Select Linked devices and then tap again on Multi-device beta for the page options to display, which explains the limitations of the feature and other things.
Step 3: From here, tap on the Join Beta button to continue and select link device button to scan the QR Code on your WhatsApp Web, desktop app or Portal.
Lastly on WhatsApp web some features such as view live location on companion devices, messages with link previews, creating and viewing broadcast list are not supported.