This phone is GREAT!! Update Jelly Bean from Nexus S without problem, the ram and storage is enough for you. For the other users that cannot update their version. maybe your device is rooted.. you must do a factory restore to update your device.
Specs of Samsung Google Nexus S (i9020)
GENERAL
- 2G Network: GSM 850 / 900 / 1800 / 1900
- 3G Network: HSDPA 900 / 1700 / 2100
BODY
- Dimensions: 123.9 x 63 x 10.9 mm (4.88 x 2.48 x 0.43 in)
- Weight; 129 g (4.55 oz)
DISPLAY
- Type: Super AMOLED capacitive touchscreen, 16M colors
- Size: 480 x 800 pixels, 4.0 inches (~233 ppi pixel density)
- Multitouch: Yes
- Protection: Oleophobic coating, Contour Display with curved glass screen
SOUND
- Loudspeaker Yes
- 3.5mm jack Yes
MEMORY
- Internal: 16GB storage, 512 MB RAM
DATA
- GPRS; Yes
- EDGE: Yes
- Speed: HSDPA, 7.2 Mbps; HSUPA, 5.76 Mbps
- WLAN: Wi-Fi 802.11 b/g/n, DLNA, Wi-Fi hotspot
- Bluetooth; v2.1 with A2DP
CAMERA
- Primary: 5 MP, 2560 x 1920 pixels, autofocus, LED flash, check quality
- Features: Geo-tagging, touch focus
- Video: Yes, WVGA@30fps
- Secondary: VGA
FEATURES
- OS: Android OS, v2.3 (Gingerbread), upgradable to v4.1.1
- CPU 1 GHz Cortex-A8
- GPU PowerVR SGX540
- Sensors: Accelerometer, gyro, proximity, compass
- Messaging: SMS(threaded view), MMS, Email, Push Mail, IM, RSS
- Browser: HTML, Adobe Flash
- GPS Yes, with A-GPS support
- Java: MIDP emulator
BATTERY
- Standard battery, Li-Ion 1500 mAh
- Stand-by Up to 713 h (2G) / Up to 428 h (3G)
- Talk time Up to 14 h (2G) / Up to 6 h 40 min (3G)