Go to your phone's settings or use a special code to find your SIM 1's IMSI number.
Because the data is compressed and optimized, pages load significantly faster on feature phones compared to built-in browsers. 3. Low Resource Consumption
Feature phones suffer from highly restricted RAM capacities and slower cellular networks. The Opera Mini 4.4 architecture circumvents these issues seamlessly by using proxy-based compression. Opera Mini 4.4 – boostapps