I think the reverse wireless charging feature is the most underrated feature on Samsung. It allows me to charge my TWS or smartwatch whenever it is low on power. Have you tried this feature yet?
I think we all know that wireless Android Auto makes your phone incredibly hot. Features like navigation, charging, Bluetooth audio, and mobile data together heat up the phone, especially in Delhi summers. But I think that the Galaxy S26 Ultra manages to deal with it pretty well due to its large vapour chamber. I can see the difference while I am driving for hours with Android Auto enabled.
I think Samsung has come up with the most underrated feature with its wireless power share. Last week I was on a flight, and suddenly my earbuds died! Instantly, I was reminded of my Galaxy S26 Ultra's wireless charging feature. I placed my earbuds on the back of the phone, and it started charging. It can also quickly top up smartwatches, too. Such a useful feature during emergencies!