After updating my IQOO Z9 to android 15 there are so many problems but mainly there is heating issue in normal uses and charging, second while gaming there is huge performance issues games are not running smoothly and dropping fps and lagging, third battery is draining very fast and forth 5g network issue for call drop.So I request IQOO team to solve these issues in next patch update and optimise the phone and provide best experience to users.