Register Math Cloud Wallet
Install MathWallet from https://mathwallet.org
Switch to Cloud Wallet and register a new account
Deposit your YAS-EOS from your EOS wallet into cloud wallet
Using MathSwap in Cloud Wallet
Switch to ‘Trade’ tab and select ‘YAS’ in the swap from, enter the number of YAS you need to swap to YAS-Mainnet
Create YAS wallet
You need to use DAPP to create your YAS mainnet account first
Then you need to import the YAS account, select YAS as wallet type and click + to import your YAS account
For Chrome extension wallet, check below article
http://blog.mathwallet.org/?p=1173
Withdraw YAS-Mainnet to YAS wallet
Switch back to CloudWallet, and choose transfer the YAS-Mainnet token
After the cloud transaction completed, you will get the Mainnet YAS in your YAS wallet
Any questions, join: https://t.me/mathwallet