I am using Opera Mini for a year and initially it was great and very fast but now a days it has many ads in it and the download speed is also reduced and it does not boosting the download speed. It is very hard to use this browser in 2G you will get very slow speed.
I don’t like the way it putting the advertising on their front page which is very odd and interrupted too. The download speed is also very slow comparative to other browser. I got very bad experience with this software.
I recommend using UC Browser to get good download speed and smooth browning speed. Or simply use Chrome Browser for overall good performance. The overall layout of this browser are awesome and the User Interface is great you can use it at night also.