iPhone 13 Pro Battery | Screen | Notifications

Dear Apple Community,

I would appreciate your help.

I bought my iPhone 13 Pro in November 2021 and I was happy with it until February 2022 when an update came for the iOS. After that problems started to appears:

P1. Battery drain - I unplug my iPhone at 8 am and the battery gets to 30% at 2 pm. I understand that I am a heavy user, using a lot of social media apps, radio streaming, Google Maps, but I don’t think it’s a normal battery drain. I even tested video streaming on YouTube today and for two hours the battery drawn about 20%, see the screenshot attached.

I have this issue for about three months now and I have read a lot of forms and I have tried a lot of solutions but none of them worked for me:

S1. Yes, I have tried network resetting. It didn’t work.

S2. Yes, I have tried factory reset erasing all content. It didn’t work.

S3. Yes, my iOS is up to date and all apps are automatically getting updated with its latest version. It didn’t work.

S4. Yes, I have tried rebooting my phone. It didn’t worked.

Please note that I have tested all these potential solutions during a three months period.

Then comes another problem that I discovered yesterday.

P2. While I was using the app Duolingo during a sunny day of 30°C under an umbrella, the screen started to dim suddenly until the point, that I could barely see what's happening on my screen. And yes my phone was on auto-brightness, which means it should automatically stay on the highest brightness. I continued using it like that and after 10 min. the screen started to increase back to full brightness. After 5 more minutes, it started to go down back. It seems like its sensors were going crazy, even if there were same light conditions. And yes, the screen was clean where the sensors are located. Battery percentage was above 50%.

P3. Notifications - old unsolved issue. I clear the notifications that I don’t want to read from the lock screen and after a while they reappear again. Why? I don’t understand. Another example is: I see five messages on Instagram in the notification centre and I press on one message and I read all of the messages within the Instagram app which means that the other messages from the notification centre should have been cleared automatically. But no. Once I close the Instagram app and look at the notification centre, I see the other four messages still remaining on the screen. Why?

Who could help me with a throughout diagnostics of all this issues?

Thank you for your time and consideration.

Sincerely,

Roman