The secret sauce of Opera Mini has always been its rendering engine. Unlike modern browsers that process web code on your device (client-side), Opera Mini sends the URL to Opera’s servers. The server fetches the page, compresses it by up to 90%, and sends it back to the phone as a lightweight, pre-rendered package.
: Smartphones were prohibitively expensive for large segments of the population. Feature phones running VXP apps provided a low-cost alternative. opera mini 4.4 vxp