MetaMask

1. Go to settings page

1. Add a new network

   

Mainnet
    RPC URL: https://bsc-dataseed.binance.org/
    ChainID: 0x38, 56 in decimal (if 56 doesn’t work, try 0x38)
    Symbol: BNB
    Block Explorer: https://bscscan.com

1. Transfer some bnb into your new binanice smart chain address.