Samsung m21 is draining battery while phone is on sleep mode at night,

[sajwan1984]

After updating to one Ui 3.0 my m 21 is having battery drain issue while in sleep mode .it grains from 6 to 7 percent within 7 hours ,even when data is off,before update it there was no issue ,kinly advise .

[sajwan1984]

Volume level of samsung is decreased after update ,nothing is audine in half volume..is this with everyone

[Shekhar111]

I'm also facing these issues.
phone gets heated even after playing a light game for about 15 minutes.
Volume level also has decreased.

Less battery backup than earlier.

[Deepak8587]

same issue

[akhil094]

did your always on display remains turn on whole night ? AOD consumes around 5% within 8 hours.

[sajwan1984]

yes it was on but ,not always on ,only while touching phone

[FuriousøGoku]

guys i think you all have some issue while downloading the firmware because i can't feel any issue.

[Deepak8587]

hlo guys before one ui 3.0 i was happy with my battery i was getting around 7 hours of screen on time with battery from 75 per to 20 per but now i am getting around 3-4 hours of screen on time, for 20 min of call it consumed 12-13 per battery initially it was 5-6 per, l can feel my phone warm now, is there any way to undo update or will there be any further uodate to resolve this issue

[Samsung_Support1]

Dear Samsung Member,

Greetings from Samsung Customer Support!

To resolve your device battery drain issue please visit this link: https://www.samsung.com/in/support/mobile-devices/samsung-mobile-battery-drain-issue/

For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support