Download and install Metamask to your browser.
Here's a Metamask tutorial in case you get stuck.
Purchase Ethereum to cover gas (transaction) fees. You can purchase through Metamask by opening wallet and clicking buy.
Purchase a token you wish to swap for IOEN. Easiest option is to purchase enough Ethereum to cover gas fees and IOEN purchase.
Make sure you have a token in your wallet that you want to swap for IOEN and enough ETH to cover gas fees. View UniSwap Swap Fee.
Paste the code into the search bar, then tap/click 'Import'.
A warning message will appear saying the token does not appear on the active token list. This is to be expected, tap/click on the Import button again.
If you haven't already, connect your preferred wallet to UniSwap by tapping/clicking 'Connect Wallet' and selecting your wallet.
If you haven't already, select the token you wish to swap for IOEN. Enter the amount you want to swap then tap/click Swap.
Confirm the details are correct and tap/click Confirm Swap.
Confirm the transaction through your wallet.
Open Metamask. Under Assets tab scroll to the bottom and tap/click Import Token.
Select the Custom Token tab, paste the code in the field titled Token Contract Address then tap/click 'Add custom token' and then 'Import Tokens'.