First download MathWallet app：https://www.mathwallet.org
Create/import Flow wallet
Switch to Flow wallet
Click Import Wallet (Please store carefully your mnemonic phrases)
Choose Import with Kesystore
Enter the address you want to import
Enter Keystore related information, and click import a wallet
You could see your wallet now
Flow DApp
Click DApps to check Flow DApp
Contact us：
Telegram: https://t.me/mathwallet
Email：Hello@mathwallet.org
Twitter: @MathWallet