You can buy ETHs using the pair ETHs/ETH.
Android and IOS:
1. Click on Exchange tab from the app's main screen;
2. Select the pair ETHs/ETH;
3. Click on Buy;
4. Add the amount of ETHs that you would like to buy;
Web Platform:
1. Access https://wallet.lykke.com/
2. Tap on Trade icon from the app's main screen.
3. Search and select the pair ETHs/ETH;
4. Enter the amount of ETHs you would like to buy and tap Buy.