Hi harshitsoni2806,
About call screen problem, does this problem appear only when do not disturb is enabled?
If yes, please show me a screenshot of your do not disturb settings.
Could you tell us when did this problem start to appear? (Which firmware version)
For brightness problem, we have checked with the relevant team about this.
We will notify you once we receive any updates on this.
Thank you for your feedback. 🙂