I am also using this ogome frok last 6 months.
And it started showing problems like volume of songs automatically get high and slow.
Sometimes too slow.the feature which help us to on data connection or off data connection id misbehaving. It doesn’t work. I have to restart my phn everytime to use internet. Another problem is it hangs so much. this phn allows installation of unknown resorces after being restricted from settings. Some apps like mobiquick and time of india and myntra download autimatically. I dnt want these apps. this is really disgustting and irritating . Too many addss. I m frustated.