Step 1: Open Coin98 Mobile Wallet and click Add wallet on the home screen.
Step 2: Choose Polkadot icon, then select Create Wallet.
Step 3: Enter your wallet name, then select Create.
Store the Passphrase and Private Key, then copy and paste Passphrase or Private Key to the Confirmation box.
Tick to confirm that you have saved the Passphrase and Private Key and then select Done.
Select Manage on the homepage to check your wallet.
Note: Make sure your balance is always >1 DOT or else it will be wiped from the blockchain.