So many issues in my S24 ultra after update of One UI 8

[MeetS23ultra]

My issue list

1. Over heating in day to day work(no improvement)

2. Battery drain is high as always 

3. Network issue with jio 5g. No sound when I first connect the call.

4. Internet speed issue. Like no constant speed & same place give high speed & then drop to 0 then again goes to high speed.

[jassi0786]

same wifi issue , connected but poor speed in a plan of 200 mbps