Desktop
You must have the Binance Web3 Wallet app installed on your phone. You can download it from your app store.
go to https://app.1inch.io/;
click on ‘Connect Wallet’, accept Terms of Service, choose network and wallet - ‘WalletConnect’
Scan the QR code presented on https://app.1inch.io/ with the Binance Web3 Wallet
Confirm connection to 1inch.io in the Binance Web3 Wallet.
Please, note that Binance Web3 Wallet supports multiple networks. To swap, you will need to select the same network on both the wallet and 1inch interfaces. To select network in the Binance Web3 Wallet, click on the drop-down menu in the upper part of the screen.
You will then be able to interact with 1inch.io in your desktop browser and confirm any transactions in the Binance Web3 wallet.
Mobile
You can use the mobile app web browser to access the 1inch Dapp.
First navigate to the browser by clicking its icon in the bottom of the screen.
Click on the adress bar and type app.1inch.io.
Confirm. A pop-up will ask you to confirm the legal disclaimer, check it. You may also check the other box if you do not want to see this warning again.
You will arrive to the 1inch dApp page. Click on the Connect Wallet button.
A list of wallets will appear. Click on "Binance wallet". Your wallet will now be connected to the 1inch dApp.