Android requires high processing power to operate smoothly without any lags. Miro has single core CPU clocked at 800 MHz. So, it is pretty normal if phone lags a little bit.
To speed up the phone, few tips are given:
1- Keep less applications installed if possible.
2- Go to 'developers options' in settings and enable ''force GPU rendering'' if available.
3- Use some good task manager available at play store to kill running programs and processes in background. Set it to automatically do this after certain interval of time. (Add ''contacts'' and ''messaging to exception). I shall recommend to use ''advanced task manager''.
4- Clear history and cache to speed up web browser.
5- Keep less widgets on desktop. Animated widgets slow down navigation through screens.
6- Instead of using live wallpapers, use static wallpapers. Live wallpapers require processing power of GPU and therfore slow down mobile a little bit.
