Please download/update MathWallet： http://mathwallet.org
Create Polkadot wallet
Polkadot App Wallet User Guide
Claim DOT
Switch to the ETH wallet in the upper right corner and import the ETH wallet with DOT
Open DApp when the import is complete – DOT Claim Tool
After confirming the information is correct, click signature and enter password and click confirm
Click claim, and the DOT will be sent to the corresponding Polkadot wallet
For more question, please contact us on telegram: