weiallin , via OnePlus Community App , Nov 17, 2020 : Hi, Just purchased the OP8T from T-Mobile and I was wondering is there a way to install the original Oxygen OS so that I can get updates as soon as OP releases them rather than waiting for T-Mobile slow updates. Do I need to have the device paid off? Is there an official OP ROM? Will this mess up any T-Mobile features like wifi calling, etc.? Thanks!