S21 ultra - one UI 4.0 battery indicator showing 0%

[Ray1234]

Hi guys, updated my s21 ultra to the new UI yesterday, however my battery indicator on the top right of the phone is showing 0%, it shows properly in the battery usage app and when you plug in for charge it shows correctly in the middle of the screen, it also dissappears everytime I restart the phone even if indicator is turned on, I have wiped the cache partition, let the phone drain to zero and full charge again, nothing seems to resolve the issue, so annoying without a working battery indicator, any help would be much appreciated 

[Dzejo]

I had the same problem with my S21. Thank you for your help. It was enough to switch on demo mode, then switch off and restart phone (without reset). 💚

[Xygao]

Hi, I had the same problem with my Note 20 Ultra. I found the way to show the real capacity of the battery. I switched on the Developer option and tried the menu inside. I think the bug had something to do with "Demo mode" since I switch on demo mode, the battery percentage shows 0%. So I decided to TURN OFF the developer mode and restart my phone, and VOILA... problem solved.

I hope this help

[joester]

Demo mode for the win on my s10e!