How to redeem PUBG Mobile Unknown Cash (UC) from the PUBG Mobile Webshop:

1.    Visit the PUBG Mobile Webshop
2.    Select your region
3.    Select "PUBG Mobile" and click "Redeem" 
4.    Enter your Player ID and the Redeem Code, the click "OK" to complete the process
5.    You will find the purchased UC delivered through in-game mail