HTC introduced the first (and till 2010 CTIA, the only) smartphone with WiMAX support (HTC MAX 4G) in Russia in 2009. So, it came as no surprise that Sprint chose HTC as its partner to bring out the first US WiMAX device in a smartphone form factor. Based on the tried and true Snapdragon platform (which also happens to be the brains behind the Google Nexus One), it is not the application processor which takes the laurels here, but the radio chipset used. Since the application processor also plays an important role in the end user experience, let us take a short detour to analyze the pros and cons of the Snapdragon platform used here before looking into the winner in the radio chipset.



The Snapdragon CPU used in the HTC EVO 4G is the QSD8650 along with 512MB RAM and 1GB of onboard storage. The QSD8650 has a Scorpion core at its heart, which is a specific implementation of the ARMv7 architecture. With an architecture license from ARM, Qualcomm spent almost 4 years and more than $300 million in designing it. Fabricated at TSMC in the 65nm process, the custom implementation can be clocked upto 1GHz. The performance of this single core ARMv7 implementation lies between that of ARM's own Cortex-A8 and Cortex-A9 designs. However, the CPU core in an app processor is only part of the story. The majority of the capabilities of the app processor lie in the surrounding IP, namely, the components responsible for the graphics, DSP and media processing, as well as the SoC infrastructure.

It is in this IP that Qualcomm may be said to be lacking. In the QSD8650, the GPU core is the Adreno 200. Qualcomm acquired AMD's handheld graphics unit for $65 million in 2006 and inherited the Imageon product line. This was later rechristened as Adreno, and to this date, Qualcomm uses graphics cores from this product line for their app processors. Unfortunately, the raw performance numbers for this product line don't compare well with the same generation product from other vendors such as Imagination Tech and Vivante, which are used by TI and Marvell respectively. The DSP and media processing in the QSD8650 is nothing to write home about either. With support for only upto 720p HD video encode / decode, it faces stiff competition from other app processors (which boast of 1080p encode / decode) being introduced into the market this year. It will be interesting to see how Qualcomm improves the Snapdragon platform in the dual core avatar slated for introduction later this year. We will cover the Snapdragon platform in more detail in a later article.


The real winner in the HTC EVO 4G is a relatively unknown semiconductor company, Beceem Communication. A provider of chips for 4G communication, the company exclusively powers the Sprint WiMAX network. It is believed in industry circles that the HTC EVO 4G's WiMAX support is powered by the Beceem BCSM250 (which is already a part of some of the other 4G equipment supplied for utilizing Sprint's network). Beceem, along with Motorola, also announced plans to support both WiMAX and LTE standards in the BCS500 introduced at the 2010 Mobile World Congress. All in all, Beceem looks set to be a dominant force in the US radio chipset market for 4G devices in the near future.

Update: It looks like the WiMAX baseband chip in the HTC EVO 4G isn't made by Beceem but rather Sequans Communication.

CTIA 2010 The Samsung Galaxy S
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  • ksherman - Wednesday, March 31, 2010 - link

    That HTC EVO 4G phone is looking AWESOME. I live near Chicago, one of the home bases for Clear/Sprint's WiMAX areas. First phone I've seen yet that will make me drop my iPhone 3G to get. Really excited about it's ability to become a local WiFi access point for my laptop which will be extremely valuable to me as a photojournalist. I won't have to have two separate plans.
  • JonnyBlaze - Wednesday, March 31, 2010 - link

    You can make almost any current Android phone act as a wireless access point right now.
  • ksherman - Wednesday, March 31, 2010 - link

    Sure, but none have WiMax. I used to tether my iPhone 3G's 3G signal to upload pictures and it was virtually useless.
  • sinchesterjenkins - Thursday, April 1, 2010 - link

    Not a 4G wireless hotspot for up to 8 devices. This phone is a game changer.
  • jordanclock - Wednesday, March 31, 2010 - link

    Why are their so many mentions of whether these platforms support HD encoding/decoding? The encoding makes a little sense, but who is really going to take HD video clips with their phone? And I'm really not concerned that I won't be able to watch HD videos on my 480x800 screen. There isn't even a video output (unless you count USB?) to hook it up to an external monitor.

    I'm GLAD when they don't waste silicon on being able to handle HD from my phone. I want that silicon used to make the user interface quick and be able to render web pages faster.
  • ganeshts - Wednesday, March 31, 2010 - link

    While HD encode (recording HD video) remains a checklist feature for app processors, HD decode (playback) has become much more than that. The reason is the abundance of media that people want to store on the go / playback. The rise of media streamers as a market is a case in point.

    Now, cell phone manufacturers have realized that people really do not need a separate media streamer at home. All they need is a dock to which the cell phone can be connected, and this may connect to the TV through HDMI for video playback.

    That said, the Sprint HTC EVO 4G does have a mini HDMI port at the bottom which may enable HD video output to a TV. Also, the Samsung Galaxy S has an optional cradle dock which enables it to be tabled and used for a multitude of purposes other than just wireless communication. Samsung also announced in its press release for this phone that they are planning to team up with content providers to enable downloading of full length movies and other media onto the device. Also, it sports an 'AllShare' feature utilizing the DLNA standard to communicate with other devices (including TVs). So, we might be able to playback HD video on a separate big screen, after all! How well this would work remains to be seen.
  • jah1subs - Wednesday, March 31, 2010 - link

    Sprint is showing off their 4G network by emphasizing 720p video for this device. I am using the Sprint 3G/4G modem for work. We're saving a little bit of money right now by using only 3G speeds (I can see a 4G enabled tower by looking out the window) because I am using this primarily for email and browsing, not multimedia.
  • RaistlinZ - Wednesday, March 31, 2010 - link


    Can you guys please be on the lookout for that xoloot poster and others like him that try to advertise their businesses here? Thanks.
  • Adul - Thursday, April 1, 2010 - link

    block their damn ip address this is getting annoying
  • Anand Lal Shimpi - Thursday, April 1, 2010 - link

    They usually come back regardless of what IP we block. We have implemented some fixes though :-P

    Take care,

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