• How to See Your Linked Devices

Signal uses your phone number to identify who you are, which means you have to sign up and log in using your smartphone to use the service. Once you have done this, you can link other devices, like an iPad or a computer running macOS, Windows, or Linux. You can only use one “mobile device” with Signal at a time, but you can link up to five other devices, like tablets or laptops. This means you can only have one primary iPhone or Android smartphone linked to your account at any time. You’ll need to re-register Signal if you want to switch from Android to iPhone or vice versa.

To see existing linked devices, or to add more, open Signal on your primary smartphone and tap on your profile icon in the top-left corner of the screen. Tap on “Linked Devices” in the menu that appears to see any other devices you have added. Tap the plus or “Link New Device” button to add another device using a QR code.

• Deactivate Linked Devices in Signal

Your main Signal device—your primary smartphone—can be used to unlink any connected devices. To do this, reveal your linked devices by tapping on your profile icon in the top-left corner of the app.

• Next, choose “Linked Devices” from the menu that appears.

• To unlink a device, swipe left on it and tap on the “Unlink” button that appears. You’ll be asked to confirm your decision at the bottom of the screen.

• If you try to send messages using an unlinked device, you will see a warning appear to let you know that you need to re-link your device to resume normal use.

Unlinking a device will also delete any chat history on that device, since conversations are not carried over to newly linked devices for security purposes.