Blackberry 9520 full touch screen used for 4 months works excelent free to all networks ?

BlackBerry Storm2 9520 - 2GB - Black (Unlocked) Smartphone (QWERTY Keyboard) Product Information The next generation SurePress technology on the BlackBerry Storm2 smartphone - combined with SureType technology - provides better typing accuracy and a more tactile feel. You can type on a virtual, full QWERTY keyboard in portrait or landscape mode. Touch two areas of the screen at once to select multiple items. You can link to wireless networks or hotspots with Wi-Fi connectivity. While away from your regular home or work coverage areas, you can still access streaming audio and video, BlackBerry data services and more. With a powerful battery and removable back plate for easy battery swapping, the BlackBerry Storm smartphone helps you do what you love, longer. A high resolution 480 x 360 screen displays over 65,000 colors across a large wide screen - creates an awe-inspiring display that enhances all your multimedia. Product Identifiers Brand BlackBerry Family Line BlackBerry Storm2 Model 9520 Carrier Unlocked MPN PRD-20973-060 EAN 843163055971, 843163055988 Key Features Capacity 2GB Colour Black Network Technology CDMA, EDGE, EVDO Rev. A, GPRS, GSM/UMTS/HSPA Band GSM 850/900/1800/1900 (Quadband) HSDPA 2100 CDMA2000 800/1900 EVDO Rev. A 800/1900 Style Bar Camera 3.2 Megapixel Memory Supported Flash Memory Cards Micro SDHC, microSD Battery Battery Type Lithium Ion Battery Capacity 1400 mAh Battery Talk Time 360 min Battery Standby Time 305 hr Display Display Technology TFT LCD Diagonal Screen Size 3.25 in. Other Features Touch Screen Yes Bluetooth Yes Digital Camera Yes GPS Yes QWERTY Physical Keyboard No Email Access Yes Internet Browser Yes Speakerphone Yes Dimensions Height 112.5 mm Depth 13.95 mm Width 62.2 mm Weight 160 gr