m21 very bad performance

[manishpassi21]

M21 adaptive brightness not working properly. Not change or adjust itself ,need to set manually again n again.

Some time hangout, need to restart.

6000 battery is not upto mark. Because mi note 4 have 4000 mah battery n giving full day back up similarly same as Samsung m21 are giving only one day back up while it's battery mAH one and the half more than mi note 4.

0 to full charge taking 3 hours + aprox so can't be said it's a fast changing but it showing fast charging on display when plugging into charging.

Back finger print sensor response to delay in case of slightly wet finger.

Single side ki additional features only with apps or with camera so we can't be select any kind of settings option on side key for example double press to switch off the torch light or menu key etc.

Still reviewing n if I observe then will update this post😔

[MehulJain]

You might be using your phone while charging so its taking 3hrs to charge
and check your background apps and see usage whos consuming battery.

[Spunk]

Yes hes right

[Spunk]

The adaptive brightness issue was with my device too I'm also using M21 but after update july security patch it got fixed.

[Ehsank]

1. for adaptive brightness do these steps after that it will work
go to settings > apps> click on 3 dot at left corner then choose show system app> type camera light sensor on search bar then click on it go to storage>clear cache and data
then observe

[Ehsank]

2. for battery life do these settings
1. Connection>more connections settings> disable nearby device settings

2. Location>improve accuracy >disable
A. Wifi scanning
B. Bluetooth scanning .

3. Google >click on 3dot>usage and diagnostics >off this option

4. developer option >background limit>no background processes.

5. Long press on each app specially 3rd party and rarely used app>app info>

A. Mobile data> allow background data usage>off

B. Battery >allow background activity >off

C. Notification >disable unnecessary notifications like promotional and unnecessary reminder notifications.

6. Device care>battery >select "optimised and adaptive power saving.

Steps to enable developer option
settings >about phone>software information >then u find build number >tap 7 times>then back to settings
and at end of settings one new option called developer option
click on it and find that option

[Ehsank]

for fast charge once check by changing cable
otherwise clean ur charging port sometimes dust and moisture crearte problem
and last option
first disable fast charging and put on charge then after 20-30 minutes again enable fast charge

[Ehsank]

for fingerprint issue
register again with all sides of your fingers and add 2-3 times the same finger simultaneously for better result
and also clean fingertips area as due to moisture some time delay result

[Ehsank]

@ mainsh if my comment is useful then please
ACCEPT AS SOLUTION BY CLICKING ON 3DOT AT MY COMMENTS

[cs-member13]

Dear Samsung Member,

Greetings from Samsung Customer Support!

To resolve these issue kindly follow the given below steps:

1) Check app cache:-Settings>Device care>Storage>Clean now.
For a particular application:-Settings>Apps>Pick the app that you like to clear off the cache memory. For example 'Samsung Internet' >Storage>Clear Cache.

2) Reset the Device :- Kindly create data backup of your device via SMART switch mobile application or http://www.samsung.com/in/support/smartswitch pc suite
How to reset :- Settings>General Management>Reset

"if the issue still persists, kindly get back to us with additional information- Error log File, Video or Screen-shots. This will help us to further investigate and resolve your concern."

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support