WalletConnect is an open protocol for connecting Wallets to Dapps
Other than qrcode support, WalletConnect also works with mobile browsers
We use mobile browser open the WalletConnect official demo page to do the test
https://example.walletconnect.org
Click 'Connect to WalletConnect'
Select 'MathWallet'
Then the demo page will open MathWallet App, and you need to click the 'Confirm' button in MathWallet and finish the login
Then you need to manual switch to mobile browser and you will find now you are in login status. You can click the other buttons to test transaction related test
The page will open MathWallet App again, and popup sign transaction window
The code of the WalletConnect Demo is below which can be referenced by dapp team
https://github.com/WalletConnect/walletconnect-example-dapp
Don't forget to download MathWallet and start connect with WalletConnect on mobile
https://mathwallet.org