Active Level 3
My phone (Galaxy M31) has a good back cover, tempered glass and I take utmost care while handling it. But in the last two days, it has started bleeding. A purple patch has started forming from left side and it's growing rapidly.
I would like to know whether it can be fixed. Also I needed to know how much does it cost. I have one year warranty and it hasn't ended yet.
Expert Level 1
please take it Samsung service centre and get replaced will in warranty.
Expert Level 5
this issue not related to cover or tempered glass, do visit service centre first, if this is due to manufacturing defects and your mobile under warranty then possibly you get free of cost
Active Level 10

Dear Samsung Member,

Greetings from Samsung Customer Support!

To resolve the issue kindly follow the given below steps:-

1. Display brightness level:- Kindly set the device display brightness in auto mode (If available).
Steps to adjust brightness in auto mode: Swipe down on the home screen to open notification panel>Turn on Auto brightness. 

2. Reset the device:- Settings >General Management > Tap on Reset.
Note: Before reset make sure to have back up of the data via Smart Switch Mobile App
(Install Smart Switch App > Open > Click on Memory Card Icon >Back Up option > Choose the data for Back up > Back Up).

If the issue still persist, kindly register your concern in Samsung Members app along with screenshots, short videos and error log file(Samsung Members app > Get help > Feedback > Error report/ask question).
Note: Please send device log files within 15 minutes of issue occurrence along with the exact issue details.

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support