Siemens S55 vs Asus ZX1
| Type | Bar (classic) | Touch | Touch | Touch |
| Dimensions | 101.00 x 42.00 x 18.00 mm | 115.60 x 59.40 x 13.20 mm | 119.00 x 63.00 x 13.00 mm | 104.00 x 58.00 x 11.50 mm |
| Weight | 85.00 g | 119.00 g | 135.00 g | 97.50 g |
| Display size | - | 2.80" | 4.00" | 3.00" |
| Display | Color / CSTN 256 colors 101 x 80 px | Color / TFT 64k colors 240 x 320 px (2.80") 143 ppi | Color / TFT 64k colors 480 x 854 px (4.00") 245 ppi | Color / TFT 256k colors 240 x 320 px (3.00") 133 ppi |
| Display protection | ||||
| Additional display | ||||
| Protection of the secondary display | ||||
| Talk time (max.) | 2G: 360 min. (6.0 h) | 2G: 300 min. (5.0 h) 3G: 200 min. (3.3 h) | 2G: 415 min. (6.9 h) 3G: 425 min. (7.1 h) | 2G: 1020 min. (17.0 h) 3G: 370 min. (6.2 h) |
| Stand-by (max.) | 2G: 300 h. (12.5 days) | 2G: 150 h. (6.3 days) 3G: 150 h. (6.3 days) | 2G: 600 h. (25.0 days) 3G: 480 h. (20.0 days) | 2G: 850 h. (35.4 days) 3G: 540 h. (22.5 days) |
| Standard battery | Li-Ion 700 mAhBuy powerbank
| Li-Ion 1150 mAhBuy powerbank
| Li-Po 1500 mAhBuy powerbank
| Li-Ion 1200 mAhBuy powerbank
|
| Quick battery charging | ||||
| Wireless battery charging | ||||
| Internal memory | 1 MB | 256 MB | 1 GB | 512 MB |
| End-user memory | 160 MB | |||
| RAM memory | 128 MB | 384 MB | 384 MB | |
| Memory cards | microSD | microSD, microSDHC up to 16 GBBuy memory card | microSD, microSDHC up to 32 GBBuy memory card | |
| Operating system | - | MS Windows CE 6.0 | Android 1.6 Donut | Android 2.3 Gingerbread |
| Processor | - | TI OMAP2431 | Qualcomm QSD8250 | Broadcom BCM21553 |
| Processor clock | - | 450 MHz | 1000 MHz | 832 MHz |
| GPU | - | - | Adreno 200 | - |
| Touchscreen | ||||
| SAR (10g) | 0,53 W/kg | 1,4 W/kg | 0,655 W/kg | |
| DualSIM | ||||
| Announced | 1Q 2010 | |||
| Other names | - | - | Xperia X10a; Rachael | - |
| GSM frequencies | 900 1800 1900 | 850 900 1800 1900 | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 2100 | 850 1900 2100 | 900 2100 | |
| LTE standard | ||||
| CDMA | ||||
| Standard TD-SCDMA | ||||
| UMA |



