Well, if there's one thing you can say about the HTC Sensation, it's that it lacks absolutely nothing. For connectivity we have GSM the 850, 900, 1800, 1900 set of frequencies, and for high speed connectivity we have UMTS 900, 1700/2100, 2100 set of frequencies, and an official HSDPA speed of 14.4 Mbit/s, though realistically the phone pulls off 5 Mbit/s. Local connectivity lacks for nothing as well with HDMI via MHL, TV-out (adapter required) Bluetooth 3.0, Wi-Fi and USB 2.0.
The engine that powers this beautiful device is HTC's first ever dual-core 1.2 GHz processor (Qualcomm MSM 8260 Snapdragon) and Adreno 220 GPU graphical chip which supports 3D acceleration and there's 768 MB RAM and 1 GB of internal storage. No luck for those expecting in built memory, but you can buy and easily use a 32 GB card hassle free. The HTC Sensation does come with an 8 GB card in the box though.
Now for the phone's showpiece, its 8 MP auto-focus dual LED flash camera. It has a maximum resolution of 3264x2448 pixels and comes with every shooting mode you could possibly want. Geo-tagging, touch-focus, image stabilization, face detection, instant capture, smile shot, ISO balance, panorama view-- in short, you name it and the Sensation has it. What's even more amazing is the amount of time it takes to take a snapshot, from unlocking the phone to saving the snapshot it takes a total of 3 seconds. So rejoice if you're someone who takes snapshots on-the-go. You can touch the screen to auto-focus, but that tends to backfire somewhat if you take a photo with clouds as the background, there is also a strong orange like hue to some pictures, taken indoors against a white background in low-light conditions. There is also some micro blur on two different but close objects of the same color, like flower petals for example, but you'd need a microscope to notice the blur. Overall picture quality is excellent, but not as excellent as the Galaxy S II's picture quality.
Video recording on the other hand, is probably the best in the business right now. The phone records full 1080p HD videos at a butter smooth rate of 30 FPS, there is little to no judder or pixelation, even when filming at high speed, there is also touch-to-focus, as long as you do it before the actual recording. Audio is recored in SRS surround as well, this really is a handy little movie maker.
The music player is a pretty standard HTC affair, minimalist UI combined with that big green musical note icon, in case you're missing the album art, an iTunes cover-flow rip off is pretty much all you've got to play with. Plug in a pair of earphones and you can access equalizer settings, you can also share your music directly via DLNA. You can even have your music player on the lock screen -- on one side you have the controls, flip it around and you have the album art, it's not very practical but it does look very cool. Sound quality is sterlingly deep and remains focused even on the highest volume setting, plus almost every popular audio file format is supported, such as -- MP3, AAC+, WAV and WMA.
There is also an FM radio with RDS, which for some reason takes 5 seconds to open, it scans all your stations and looks like it was ripped off Samsung's TOUCHWIZ Plus UI. The final piece in the musical puzzle is SoundHound, it tells you the name of any song by listening to a short sample, alternatively you can speak the song's name and artist, either way you only have 99 free shots, after that you have to pay.
The video player is a bit of an anomaly, the phone does support DIVX/XVID but the video player does not, to play XVID/DIVX you'll need to download an app such as Rockplayer or something similar. HD videos play smoothly with absolutely no lag, the 16:9 widescreen makes viewing any content an absolute pleasure, it's easy to forget that you're watching videos on a phone and not a theater. The native video player only supports MP4 (H.263 or H.264 encoded) and 3GP video formats. The HTC Sensation also comes hailing the Watch app, another iTunes rip off. Basically its a very expensive movie and video streaming service, where you can download a movie at $20 and a drama episode at about $10, you can stream over 3G but download over Wi-Fi only, the movie streams live, once it's finished streaming you then have it forever. But you can't share it on another device, you can't send it, you can't view it using TV out, basically the DRM locks the video file from being viewed or played on any device other than the HTC Sensation it was streamed on. The library has a very limited selection of content as of right now.
To round up this section we should point out the HTC Sensation comes synced with HTCSense.com, a website which allows you to remotely lock your phone, save its contacts, destroy all its information, ring it on the highest possible volume, lock it and if stolen or lost you can threaten or beg for the return of your $600 phone. It also comes with HTC Sync, which works pretty well in syncing all your media and information on a PC, it worked very well on a Macbook, I wasn't able to test it on a Linux system unfortunately.
The phone aso has GPS and A-GPS, it got a lock in under 10 seconds, so Google maps is at its best here. There is also a JAVA emulator, accelerometer sensor for UI auto-rotate, SNS integration, digital compass, Google Search, Maps, Gmail, YouTube, Google Talk, Picasa integration, an organizer,document viewer, voice memo/dial/commands, predictive texting, proximity sensor for auto turn off/on and finally a gyro sensor.