When my LG was calibrated, it was essentially the ISF settings that were calibrated... and this essentially addressed setting the gamma S curve for all three colours and luminance across 20 intensity settings using a colorimeter .. as well setting the colour balance. These settings are under Picture Mode Settings/Expert Controls
Have Klein, can travel...
The whole curved thing is a con anyway. for two reasons: on the early 4k panels, the LED cell was much deeper than normal, and caused a narrower field of view from the front of the LED. If you moved your head side to side in front of the TV, you would see a vertical strip directly in front of you (wherever you were on the panel) that was brighter than the surrounding area. Caused by the reduced angle of projection from the deeper cell. Its a good test to do to a panel today -- most are much better. Curving came around as a way of bringing the sides more on-axis than they otherwise would have been. A fix for a fault, as it were.
Also, the cheaper chinese factories couldnt make curved panels at the time, so it was used as a a differentiator to keep high end brands expensive.
Between the two justifications, the money was on the latter with the former being a useful short term fix until the cell depth was reduced.
Have just bought a couple of the 500 quid samsung 4k UHD 40" tv. Stunning value for money.