Got Screen Burn on Top Left Corner of my screen. Galaxy S23

Will the S21Fe get software-enabled adaptive refresh rate in the next update or will it be hardware-related?

I tried to add my debit card but it was not possible as the card is not supported. I have debit cards of Bank of Baroda and Canara Bank. Is there any possibility that these cards may be supported?

Can anyone tell here that S21 Fe supports external mic. I have boya M1 Aux connector mic which I connected with 3.5mm jack to Type C Connector but it is not working so is there any setting of support external mic.

Battery performance of Samsung Galaxy S21 Fe is not good, it can be solved by adaptive refresh rate (10hz to 120hz), Samsung should improve battery performance in its new updates.