Note 5 Nougat: Screen resolution not switching to WQHD

[AC Question]

Yesterday my Note 5 updated to Android 7.0 (Baseband N920CXXU3JQBB) through automatic OTA update. After switching to power saving mode screen resolution automatically changed to FHD (1920 x 1080) but after disable power saving mode the screen resolution is still stuck at FHD. Even by manually switching to WQHD (2560 x 1440) and restarting the phone is not helping.

Looking for help desperately.

 

[Super Dave426]

The first thing to try after any update is a cache wipe.

https://support.t-mobile.com/docs/DOC-27659

 

[Hamza Azeem]

Done that but no effect.

 

[jlost]

They all look the same to me. Idk

 

[Climb14er]

My phone after update does not go into the highest resolution. Even after a few updates.

 

[myandroidgs6]

How do I manually change the resolution to WQHD (2560 x 1440) anyway ...?