The free data often does not cover video streaming, large file downloads, or third-party browsing sessions outside of the Opera Mini app.

Opera often partners with carriers like MTN to provide daily free data (e.g., 50MB or 100MB). The "121 MB" might be a specific data balance or a local promotion.

One of the earliest versions of Opera Mini, version 4.0, was released in 2006. It was a game-changer. The browser was tiny, at just 121 MB, and it could run on even the most basic of phones. People were amazed at how quickly they could access their favorite websites, check their email, and even browse YouTube (which was still a relatively new platform at the time).

Modern versions of the full Opera Browser for Android can reach sizes over 100 MB, whereas Opera Mini is designed to stay compact.

Smart page compression (up to 90%), single-column view, and simplified UI for small screens. Evolution of File Size