"We have a lot of brand equity at Sprint and HTC in EVO," Sprint's product chief Farid Adib said. "It's hard for us to let go of that franchise, and it does have a lot of dedicated users. You don't want to disenfranchise customers by letting go of something that's very important to them."
EVO is a more established brand than One, Adib said.
Maybe this is the real point: calling the phone an EVO also calls out how the device was "codesigned with Sprint" rather than being an off-the-shelf HTC model, Harlin and Adib said.
HTC chief product officer Kouji Kodera said "there's a lot of operator franchise markets, and in those cases branding and those discussions will come from the [operator] customers," which was apparently a hint that carriers like Sprint wouldn't let HTC have its way with the phone's branding and marketing.
Confirms this isn't an HTC only design, and it was Sprint's decision, as I've been saying all along.
I think they started with the One S platform and built up
It's the One X. Same version as ATT, which is the same as the international version. Don't let the frame fool you. The difference being the S4 chipset, but that's because LTE doesn't like the Tegra3. The EVO adds a microSD slot and the kickstand.
The One S is built with the MAO process so that back cover looks wicked.