maybe you have to use a cellphone device that is of good quality and a fairly strong internet network. but for me Rollbit is a very friendly gambling platform to play on mobile or on desktop
The internet connection has to play important role in loading these sites and Rollbit is mobile compatible as well but I suggest even if you have good quality mobile phone place bets on desktop only as it's better to have it on big screen without any issues.But yes I login sometime from my mobile and it take few seconds to load the home page.