HTC's issue seems so obvious to me...too many darn phones! The Hero, Rezound, Sensation, Rhyme, Desire, Vivid, DNA...my God, the list goes on and on. And with every variation requires a support team in the background....more overhead! Hey HTC, how about following the lead of some rather successful companies - If the One is your flagship phone (and an outstanding phone it is) - discontinue all the other models and focus all your attention on the evolution of the One. Period!
HTC set to continue 'Desire' line of entry-level handsets | Android Central
I will say this though. Samsung poured tons of marketing into their Galaxy S and Galaxy Note lines. The S and Note are halo brands for them. That doesn't stop them from making phones like Galaxy Appeal, Rugby II, Admire, Galaxy S Lightray, not to mention the mini variants.