I wait since it was announced in December about Samsung official upgrade to Android 2.3.6, GingerBread, now I already did it. No issue for me, it’s working just fine with better performance and screen:

About Samsung Galaxy S11 I9100

Improvement with 2.3.6

  • Enhance boots up speed of the phone.
  • Increases the phone’s HSPA connection speed.
  • Changes the camera Interface.
  • Enhanced the phone’s security and boosts the phone’s performance.

Check it out more detail here.