M3 Mobile MC-7100S vs M3 Mobile M3-20
| Type | Bar (classic) | Bar (classic) |
| Waterproofness & dust-resistance | IP65 | IP65 |
| Dimensions | 163.50 x 78.60 x 24.90 mm | 166.20 x 78.60 x 24.90 mm |
| Weight | 320.00 g | 324.00 g |
| Display size | 3.50" | 3.50" |
| Display | Color / TFT 64k colors 240 x 320 px (3.50") 114 ppi | Color / TFT 256k colors 240 x 320 px (3.50") 114 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Standard battery | Li-Ion 2200 mAhBuy powerbank
| Li-Ion 3300 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Internal memory | 256 MB | 512 MB |
| RAM memory | 128 MB | 256 MB |
| Memory cards |  miniSD | microSD, microSDHC up to 32 GBBuy memory card |
| Operating system | MS Windows Mobile 6.1 | MS Windows Mobile 6.5 |
| Processor | Intel XScale PXA270 | Intel XScale PXA320 |
| Processor clock | 624 MHz | 806 MHz |
| GPU | - | - |
| Touchscreen | | |
| DualSIM | | |
| Other names | M3 Sky | M3 Orange |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 900 2100 | 900 2100 |
| LTE standard | | |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Photo matrix | 2 Mpx | 3.2 Mpx |
| Resolution | 1600x1200 px | 2048x1536 px |
| Optical zoom | | |
| Flash | LED | LED |
| Dual-colour LED flash | | |
| Additional | - | - |
CAMERAS - FRONT
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v2.0 | v2.0 |
| HSCSD | | |
| HSDPA | | |
| HSUPA | | |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | |
| LTE UP | | |
| WIMAX+ | | |
| GPRS | class 10 | class 10 |
| EDGE | class 10 | class 10 |
| Bluetooth | v2.0 EDR | v2.0 EDR |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 b/g | v802.11 a/b/g |
| WiFi frequencies | 2,4 GHz | 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 | | |
| MMS | | |
| Dictionary | T9 | T9 |
| Swype | | |
| e-mail client | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | | |
Multimedia
| Radio |  | |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | 3.5 mm | 3.5 mm |
| HD Voice | | |
| Sound formats | AAC, AAC+, AMR, WAV, WMA, eAAC+ | |
| Polyphony | | |
| Video ringtone | | |
| Ring composer | | |
| Games | | |
| Java | MIDP 2.0 | MIDP 2.0 |
| Videophone | | |
| DVB-H television | | |
| TV-Out | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | |
| Stopwatch | | |
| Alarm | | |
| Calculator | | |
| Currency converter | | |
| Organizer | | |
| Calendar | | |
| Flight mode | | |
| SyncML | | |
| Data and fax | | |
| Screensaver | | |
| Themes | | |
| Interchangeable covers | | |
| Voice dial | | |
| Speakerphone | | |
| Recorder | | |
| Vibrations | | |
