Siemens A31 vs Sony Ericsson A8i
| Type | Bar (classic) | Touch |
| Dimensions | 102.00 x 46.00 x 17.60 mm | 117.00 x 59.00 x 14.00 mm |
| Weight | 85.00 g | 136.00 g |
| Display size | - | 3.50" |
| Display | Color / CSTN 64k colors 128 x 128 px | Color / TFT 256k colors 480 x 854 px (3.50") 280 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) | 2G: 300 min. (5.0 h) | 2G: 300 min. (5.0 h) 3G: 470 min. (7.8 h) |
| Video talk time (max.) | nd | 160 min. (2.7 h) |
| Stand-by (max.) | 2G: 270 h. (11.3 days) | 2G: 260 h. (10.8 days) 3G: 260 h. (10.8 days) |
| Standard battery | Li-Ion 820 mAhBuy powerbank
| Li-Po 1500 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Internal memory | 1.5 MB | 200 MB |
| Memory cards | |  microSD, microSDHC up to 32 GBBuy memory card |
| Operating system | - | OMS 2.0 |
| Touchscreen | | |
| SAR (10g) | 0,64 W/kg |  |
| DualSIM | | |
| Announced | | 4Q 2010 |
| Other names | - | - |
| GSM frequencies | 900 1800 | 850 900 1800 1900 |
| UMTS | | |
| LTE standard | | |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Photo matrix | nd | 5 Mpx |
| Resolution | nd | 2592x1944 px |
| Optical zoom | nd | |
| Digital zoom | nd | 4x |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video resolution | nd | 320x240 px |
| Video formats | nd | MPEG4 - 30 fps |
| Additional | nd | AF |
CAMERAS - FRONT
| First camera | | |
| Optical zoom | nd | |
| Flash | nd | |
| Dual-colour LED flash | nd | |
| Additional | nd | - |
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v1.2.1 | v2.0 |
| HSCSD | | |
| HSDPA | | 1.80 Mbit/s |
| HSUPA | | |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | |
| LTE UP | | |
| WIMAX+ | | |
| GPRS | class 8 | class 10 |
| EDGE | | class 10 |
| Bluetooth | | v2.1 EDR |
| A2DP Profile | | |
| HDMI | | |
| WiFi | | v802.11 b/g |
| WiFi frequencies | | 2,4 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | | v2.0 |
| GPS | | |
| A-GPS | | |
| Beidou | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | v4.3 | |
| MMS | | v1.2 |
| Dictionary | T9 | eZi |
| Swype | | |
| e-mail client | | POP3, SMTP |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | z RDS |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | | 3.5 mm |
| HD Voice | | |
| Sound formats | | AAC, AAC+, AMR, WMA, eAAC+ |
| Polyphony | 32 voices | |
| Video ringtone | | |
| Ring composer | | |
| Games | | |
| Java | MIDP 1.0 | MIDP 2.0 3D |
| Videophone | | |
| DVB-H television | | |
| TV-Out | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | |
| Stopwatch | | |
| Alarm | | |
| Calculator | | |
| Currency converter | | |
| Organizer | | |
| Calendar | | |
| Flight mode | | |
| SyncML | | v1.1.2 |
| Data and fax | | |
| Screensaver | | |
| Themes | | |
| Interchangeable covers | | |
| Voice dial | | |
| Speakerphone | | |
| Recorder | | |
| Vibrations | | |