How to run multiple instances of Roblox in one UgPhone device ?

Before even starting, I won't buy 3,4,5 devices to run Roblox accounts.
I have seen people running multiple Roblox instances on ONE UgPhone device. I couldn't find any tutorial to do that ( only how to buy several devices ). The traditional UgCloner is useless in this case cause Roblox has complex environment and it keeps updating. Any advice/tutorial how to do that ? (I'll send 800 robux for a working solution)