UBiQUiO has launched their latest smart phone, 503G, and it squarely aimed at taking down Samsung’s BlackJack. This phone is an unlocked quad band GSM handset and which includes HSDPA, WiFi, Bluetooth, 520 MHz CPU, 2.0 megapixel front-facing conference camera, 2.4″ QVGA touchscreen, and QWERTY keyboard. Windows Mobile 6 will allow for rich HTML emails, Microsoft Office integration, increased security, and all around increased productivity. This phone will work on most cell networks, but there are none in the wing right now that are currently set to offer it directly. T-Mobile is still a ways from launching it’s 3G network which will rely on HSDPA, and at&t already has the BlackJack. Look for this phone to be sold on MobilePlanet or eXpansys around the end of June for $650.