Extension:
Visit MagicEden from your browser.
Click on Connect Wallet in the top right corner.
You will be presented with a list of wallet providers, click on Phantom and then click on "Connect". If this is your first time connecting to Magiceden, you will receive a request to "Sign in" to verify wallet ownership.
You are now connected to MagicEden and free to make bids, purchase NFTs, or list your NFTs for sale!
Mobile:
If you are on mobile you will need to visit magiceden.io in the in-app browser.
You should receive a pop-up to connect automatically, if not don't worry, click on the three lines in the top left and then click on Connect wallet
A pop-up will then have you sign a message to verify your wallet and you are set!
Now you can switch freely between Solana, Ethereum, Base and Polygon.
Note: You will only be prompted with the "Sign Message" screen on the first time visiting MagicEden.
You are now connected to MagicEden and free to make bids, purchase NFTs, or list your NFTs for sale!