The Evo's design is based on its Windows Mobile-based brother, the HTC HD2 which also has a 4.3-inch multi-touch capacitive touchscreen, nearly the same slim profile, and the same placements of most general components and buttons. Although similar, the Evo has features which distinguish it from the HTC HD2 including the front-facing camera, circular-shaped camera, and touch-sensitive buttons instead of hardware buttons
Processor and Memory
The Evo is powered by the Qualcomm QSD8650 chipset which contains a Snapdragon ARM Cortex-A8 microprocessor clocked at 1GHz and an embedded Adreno 200 graphics chip capable of up to 22 million triangles per second.
It features 512MB of eDRAM which allows for a smoother experience with Android OS, applications, and the HTC Sense user interface. The device also features 1024MB of built-in ROM which is mainly used for the system software.
Cameras
The Evo features a rear-facing 8 megapixel camera capable of recording videos in 720p at 30 frames per second and it also features dual flash which helps lighten pictures in low-light conditions. In addition the Evo has a second camera on front of the device designed for use with video calling and for taking portrait images although it can also be used in applications.
Storage
Like many other Android mobile devices, the HTC Evo 4G features a microSD slot in addition to the built-in ROM which allows for user-expandable storage. The device supports microSD cards of sizes up to 32GB. With Android version 2.2+ (Froyo) available as an over-the-air upgrade, the OS supports applications which permit themselves to be installed on the SD card.
The device comes pre-installed with an 8GB Class 2 microSDHC card.
Audio and Output
The rear of the Evo sports a speaker which is used for most applications like music, applications, and such as the main speaker. A loudspeaker is located above the screen which serves as an earpiece. The microphone is featured on the bottom of the phone which is used for phone calls and voice-commands although it can also be used in many other third-party applications. The unit has an HDMI-out port which allows users to output content on a high-definition television set. The Sprint Mobile Hotspot application allows users to share the device's mobile broadband on up to eight devices.
Cellular Connectivity
The Evo features a CDMA cellular radio that supports 3G EVDO, Revisions 0, A, and the as of yet deployed B allowing faster download and upload speeds, and better power efficiency. As well as Beta WiMax, protocol known as 802.16e, which features speeds of up to 10Mbps on the downlink, and 1 Mbps on the uplink. Although the device is marketed as a 4G phone, there is no 4G standard set forth by the wireless standards committee yet.
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