ZTE X850 vs ZTE X990
| Type | Touch | Bar (classic) | Touch | Slide |
| Dimensions | 102.00 x 55.00 x 14.50 mm | 107.00 x 61.00 x 12.00 mm | 114.00 x 56.50 x 12.10 mm | 108.00 x 53.00 x 14.90 mm |
| Weight | 100.00 g | 90.00 g | 130.00 g | 119.00 g |
| Display size | 2.80" | 2.50" | 3.50" | 2.80" |
| Display | Color / TFT 256k colors 240 x 320 px (2.80") 143 ppi | Color / TFT 256k colors 320 x 240 px (2.50") | Color / TFT 256k colors 480 x 800 px (3.50") 267 ppi | Color / TFT 256k colors 240 x 400 px (2.80") |
| Display protection | ||||
| Additional display | ||||
| Protection of the secondary display | ||||
| Talk time (max.) | 2G: 480 min. (8.0 h) | 2G: 240 min. (4.0 h) | 2G: 320 min. (5.3 h) | |
| Stand-by (max.) | 2G: 480 h. (20.0 days) | 2G: 216 h. (9.0 days) | 2G: 400 h. (16.7 days) | |
| Standard battery | Li-Ion 1000 mAhBuy powerbank
| Li-Ion Buy powerbank
| Li-Ion 1250 mAhBuy powerbank
| Li-Ion 900 mAhBuy powerbank
|
| Quick battery charging | ||||
| Wireless battery charging | ||||
| Internal memory | 512 MB | 5 MB | 150 MB | |
| End-user memory | 100 MB | |||
| RAM memory | 256 MB | |||
| Memory cards | microSD up to 8 GBBuy memory card | microSD up to 8 GBBuy memory card | microSD, microSDHC up to 32 GBBuy memory card | microSD |
| Operating system | Android 2.1 Eclair | - | Android 2.1 Eclair | - |
| Processor | Qualcomm MSM7227 | - | Qualcomm MSM7227 | - |
| Processor clock | 600 MHz | - | 600 MHz | - |
| GPU | Adreno 200 | - | Adreno 200 | - |
| Touchscreen | ||||
| SAR (10g) | 0,96 W/kg | |||
| DualSIM | ||||
| Announced | 3Q 2010 | 1Q 2010 | 3Q 2010 | |
| Other names | Racer | - | RBM One | Smile Q |
| GSM frequencies | 850 900 1800 1900 | 900 1800 | 900 1800 1900 | 900 1800 |
| UMTS | 2100 | 2100 | ||
| LTE standard | ||||
| CDMA | ||||
| Standard TD-SCDMA | ||||
| UMA |



