Adding BSC Mainnet to MetaMask.

This is what you should seen when you open MetaMask by default
Fig 1. This is what you should seen when you open MetaMask by default

Switching to BSC Mainnet

What you want is to see the tap in fig 1 display BSC Mainnet instead of Ethereum Mainnet. To achieve this, click on the tab saying Ethereum Mainnet above or Main Ethereum Network as in other cases.

Select Custom RPC
Fig 2. Select Custom RPC

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Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store