In a blogpost, WhatsApp will now allow you to login your account to multiple devices. The company emphasis that they will maintain the same level of privacy and security.
WhatApp further explained that one account can be used sign-on to up to four additional devices, the same as when you link with WhatsApp on web browsers, tablets and desktops. personal messages, media, and calls are end-to-end encrypted, and if your primary device is inactive for a long period, we automatically log you out of all companion devices. Each linked phone connects to WhatsApp independently, ensuring that your personal messages, media, and calls are end-to-end encrypted, and if your primary device is inactive for a long period, we automatically log you out of all companion devices.
WhatsApps multiple login feature started to rolling-out to all users globally and will be available to all users in the coming weeks.