How to buy
Go to Uniswap on your desktop and connect your new wallet.
Choose Ethereum (ETH) as your base coin. By now you should have bought some ETH via your wallet.
Click on "Select a token" > "Manage tokens" > "Tokens" and find $OS by entering the token address:
Click on "Import" to add the OS token to your list of Active tokens. Enter desired amount of $OS you want to buy with ETH
Click on "Swap" and confirm your desire to swap ETH for OS on both your desktop and Mobile device (if needed)