Attach account
Step 1: Open the Polkadot Vault app and have the QR code ready.
Step 2: On the SubWallet homepage, hit the account name at the top of the screen to access the account selection tab.
Step 3: In the account selection tab, hit the 
button at the bottom right corner of the screen.
Step 4: Choose "Connect a Polkadot Vault account".
Step 5: Press the "Scan QR code" button.
If you haven't granted camera access to SubWallet yet
In this case, once you hit the button, your device will show the following message:
Click "Go to Settings" to open your phone's settings.
On the settings screen, switch the toggle next to "Camera" to allow the camera access to the app.
Step 6: Scan the QR code provided in the Polkadot Vault app, or upload an image containing this QR code using the "Upload from photos" option.
Step 7: Once the app recognizes the QR code, a popup will appear, asking you to enter the name of your account. Once done, click "Confirm".
You've successfully attached a Polkadot Vault account! If you repeat the action in Step 2, you will see your Polkadot Vault account displayed in the "QR signer account" section.
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