1O1O is a free mobile app developed by CSL Mobile Limited for Android devices. It is designed to help customers manage their mobile services and accounts with ease. With the app, users can access a range of features related to 5G services, applications, and handsets.

The app allows users to buy mobile services, including new mobile plans, upgrades, and hot offers. It also offers tailored offers to suit individual needs. Users can access their Coupon Wallet to find discounts and offers, buy standalone handsets, and purchase eSIMs. The app also provides value-added services such as data top-ups and roaming-data day passes.

In addition, the app enables users to check and manage their mobile services. It allows users to check data, voice, and SMS entitlements, as well as usage. Users can control data usage of their secondary SIMs, manage voice-calling features, and check their account balance, billing history, and bill settlement.

Note that selected functions and information are accessible only to 1O1O customers, and login is required to access them.

Overall, 1O1O is an excellent app for managing mobile services and accounts. It is easy to use and provides a range of features that make it convenient for customers to manage their mobile services.