Thunderbolt has access to the fast 4G mobile network. The possibility that the device will come on sale in Europe, seems unlikely. Firstly, it is CDMA handset, which is competitor to the GSM networks in Europe. Secondly, the 4G market in Europe is still quite small to be able to sell the device in decent amounts. 
The Thunderbolt is HTC smartphone that runs on Android 2.2 and is overcoated with HTC Sense UI. There will be possibility to update the OS to Android version 2.3 in the future. The device has TFT LCD display of 4.3 inches with resolution of 800 x 480 pixels.
There are two cameras on the phone. The front-facing 1.3 megapixel camera is perfect for video calls and “regular” 8 megapixel camera for taking photos that has dual LED flash, autofocus and HD video recording.
The video player supports wide range of video formats: DivX, H263, H264, MP4, WMV9 and xVID.
Thunderbold has powerful 1GHz Qualcomm Snapdragon processor, 768 MB of RAM and 8 GB of internal storage that can be extended by insterting an additional microSD card.
HTC Thunderbolt video review
Some words about internet and data connectivity of HTC Thunderbolt. There is WiFi available with WiFi hotspot option. In addition to that, there is Bluetooth 2.1 and A-GPS.
It is interesting that the phone has dual microphone inside it for better call quality by reducing noise.
It has also all kinds of sensors like most of the new smartphones. There is accelerometer, proximity sensor as well as light sensor.
Other features
Android OS, SNS integration, Digital compass, A-GPS, Google Search, Maps, Gmail, YouTube, Google Talk, Picasa integration, HTC Sense UI, Multi-touch input, Accelerometer & Proximity sensor
The phone is designed for Verizon Wireless mobile network.
The official release date of HTC Thunderbolt will be on February 24th.