Different strokes for different folks...some bought the phone for its performance, some bought it for its "2-day battery life" feature, while others bought for different reasons...If I want performance, I have the option of not activating Stamina mode, whereas when I need maximum battery life, Stamina mode has been an outstanding feature which I have the option of activating...but it's no longer the case with MM upgrade...now both Stamina and Ultra Stamina modes are no longer an option...and this is where Sony must keep its brand and product features claim promise (as stated in their Z5 Premium product site)...and not deprieve its customers the very features that were promoted and promised...otherwise it can be deemed a misrepresentation, misleading or false product feature claims on the part of Sony.
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