USSD Codes is a free Android app developed by Rasmiy Mobile Operator XK that helps you manage your cell operator subscription and account in Uzbekistan. The app supports Uzbek operators such as Uzmobile, Mobiuz (formerly UMS), and others. The app uses USSD codes to communicate with your operator, eliminating the need for an internet connection.

With USSD Codes, you can conveniently change your tariff, purchase additional internet traffic, airtime (minute packages), additional SMS packages, and more. The app is user-friendly and provides clear instructions for each action, making it easy for users to navigate the app.

Overall, USSD Codes is a must-have app for anyone in Uzbekistan who wants to manage their mobile subscription with ease and without the need for an internet connection.