17shivam , via OnePlus 9 Astral Black , Oct 20, 2021 : when i bought this every thing was fine but after their two three updates my phone is hanging , voice call lags every single time , and now ok / hey google is not working . google assistant starts randomly some times but when i use it actually it doesn't work i retrained my model many times updated app , cleared cache . trouble shooted . but it is not working . this much problem in new premium phone . i regret my decision to buy one plus 9 .