Nokia E51 vs Nokia N96
| Type | Bar (classic) | Slide | Bar (classic) | Slide |
| Dimensions | 115.00 x 47.00 x 12.00 mm | 103.00 x 55.00 x 19.00 mm | 114.00 x 59.50 x 10.10 mm | 113.40 x 53.00 x 16.80 mm |
| Weight | 100.00 g | 125.00 g | 128.00 g | 150.00 g |
| Display size | 2.00" | 2.80" | 2.40" | 3.20" |
| Display | Color / TFT 16M colors 240 x 320 px (2.00") 200 ppi | Color / TFT 16M colors 240 x 320 px (2.80") 143 ppi | Color / TFT 16M colors 320 x 240 px (2.40") 167 ppi | Color / TFT 16M colors 360 x 640 px (3.20") 229 ppi |
| Display protection |   | | | |
| Additional display | | | | |
| Protection of the secondary display | | | | |
| Talk time (max.) | 2G: 262 min. (4.4 h) | 2G: 220 min. (3.7 h) 3G: 150 min. (2.5 h) | 2G: 552 min. (9.2 h) 3G: 360 min. (6.0 h) | 2G: 420 min. (7.0 h) 3G: 300 min. (5.0 h) |
| Video talk time (max.) | nd |  | 240 min. (4.0 h) | 144 min. (2.4 h) |
| Stand-by (max.) | 2G: 312 h. (13.0 days) | 2G: 220 h. (9.2 days) 3G: 200 h. (8.3 days) | 2G: 729 h. (30.4 days) 3G: 868 h. (36.2 days) | 2G: 400 h. (16.7 days) 3G: 400 h. (16.7 days) |
| Playback time (max.) | nd | Audio: 14 h (0.6 days) Video: 5 h (0.2 days) | nd | nd |
| Standard battery | Li-Po 1050 mAhBuy powerbank
| Li-Ion 950 mAhBuy powerbank
| Li-Po 1500 mAhBuy powerbank
| Li-Ion 1200 mAhBuy powerbank
|
| Quick battery charging | | | | |
| Wireless battery charging | | | | |
| Internal memory | 130 MB | 16 GB | 250 MB | 240 MB |
| RAM memory | | 128 MB | | 128 MB |
| Memory cards |  microSD, microSDHC up to 4 GBBuy memory card | microSD, microSDHC up to 8 GBBuy memory card | microSD, microSDHC up to 16 GBBuy memory card | microSD, microSDHC up to 16 GBBuy memory card |
| Operating system | Symbian 9.2 | Symbian 9.3 | Symbian 9.3 | Symbian 9.4 |
| Interface | Series 60 3rd Edition | Series 60 3rd Edition | Series 60 3rd Edition | Series 60 5th Edition |
| Processor | ARM11 | ARM9 | ARM11 | ARM11 |
| Processor clock | 369 MHz | 264 MHz | 600 MHz | 434 MHz |
| GPU | - | - | - | - |
| Touchscreen | | | | |
| SAR (10g) | 1,4 W/kg | 0,91 W/kg | 1,31 W/kg | 1,03 W/kg |
| DualSIM | | | | |
| Announced | | | 3Q 2009 | 3Q 2010 |
| Other names | - | - | - | C6-00 |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 2100 | 1900 2100 | 850 900 1900 2100 | 900 1900 2100 |
| LTE standard | | | | |
| CDMA | | | | |
| Standard TD-SCDMA | | | | |
| UMA | | | | |
CAMERAS - BACK
| First camera | | | | |
| Photo matrix | 2 Mpx | 5 Mpx | 5 Mpx | 5 Mpx |
| Resolution | 1600x1200 px | 2592x1944 px | 2592x1944 px | 2592x1944 px |
| Optical zoom | | | | |
| Digital zoom | 4x | | 5x | 4x |
| Flash | | LED | LED | LED |
| Dual-colour LED flash | | | | |
| Video resolution | 320x240 px | 640x480 px | 640x480 px | 640x480 px |
| Video formats | MPEG4, H.263 - 15 fps | MPEG4 - 30 fps | H.263, MPEG4 - 15 fps | H.263, MPEG4 - 30 fps |
| Additional | - | - | - | - |
CAMERAS - FRONT
| First camera | | | | |
| Photo matrix | nd | 0.3 Mpx | 0.3 Mpx | 0.1 Mpx |
| Resolution | nd | 640x480 px | 640x480 px | 320x240 px |
| Optical zoom | nd | | | |
| Digital zoom | nd | | 2x | |
| Flash | nd | | | |
| Dual-colour LED flash | nd | | | |
| Video resolution | nd | | | 176x144 px |
| Video formats | nd | MPEG4 - 30 fps | H.263, MPEG4 - 15 fps | H.263, MPEG4 - 30 fps |
| Additional | nd | - | - | - |
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 | v2.0 | v2.0 |
| HSCSD | | | | |
| HSDPA | | | 10.20 Mbit/s | 3.60 Mbit/s |
| HSUPA | | | 2.00 Mbit/s | |
| HSPA | | | | |
| HSPA+ | | | | |
| LTE DL | | | | |
| LTE UP | | | | |
| WIMAX+ | | | | |
| GPRS | class 10 | class 32 | class 32 | class 32 |
| EDGE | class 10 | class 32 | class 32 | |
| Bluetooth | v2.0 EDR | v2.0 EDR | v2.0 EDR | v2.0 EDR |
| A2DP Profile | | | | |
| HDMI | | | | |
| WiFi | v802.11 b/g | v802.11 b/g | v802.11 b/g | v802.11 b/g |
| WiFi frequencies | 2,4 GHz | 2,4 GHz | 2,4 GHz | 2,4 GHz |
| WiFi Direct | | | | |
| WiFi Display | | | | |
| DLNA | | | | |
| Miracast | | | | |
| WiFi hotspot | | | | |
| IrDA | | | | |
| USB | v2.0 | v2.0 | v2.0 | v2.0 |
| GPS | | | | |
| A-GPS | | | | |
| Beidou | | | | |
| NFC | | | | |
COMMUNICATION AND MESSAGING
| Call waiting | | | | |
| Conferency | | | | |
| Call forwarding | | | | |
| Push To Talk | | | | |
| Instant Messenger | | | | |
| SMS | | | | |
| EMS | | | | |
| MMS | v1.2 | v1.2 | v1.2 | v1.3 |
| Dictionary | T9 | T9 | T9 | T9 |
| Swype | | | | |
| e-mail client | POP3, IMAP4, SMTP | POP3, IMAP, SMTP | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | | | | |
| RSS Reader | | | | |
Multimedia
| Radio | | z RDS | z RDS | z RDS |
| MP3 | | | | |
| Stereo speakers | | | | |
| Audio Jack | 2.5 mm | 3.5 mm | 3.5 mm | 3.5 mm |
| HD Voice | | | | |
| Sound formats | AAC, AAC+, AMR, M4A, MIDI, MP4, RA7, XMF, eAAC+ | AAC, RA, WAV, WMA, eAAC+ | AAC, AAC+, AMR, RA, WAV, WMA, eAAC+ | AAC, AAC+, RA, WAV, WMA, eAAC+ |
| Polyphony | 64 voices | 64 voices | 64 voices | 64 voices |
| Video ringtone | | | | |
| Ring composer | | | | |
| Games | | | | |
| Java | MIDP 2.0 | MIDP 2.1 | MIDP 2.1 | MIDP 2.1 |
| Videophone | | | | |
| DVB-H television | | | | |
| TV-Out | | | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | | | |
| Stopwatch | | | | |
| Alarm | | | | |
| Calculator | | | | |
| Currency converter | | | | |
| Organizer | | | | |
| Calendar | | | | |
| Flight mode | | | | |
| SyncML | | | | v1.2 |
| Data and fax | | | | |
| Screensaver | | | | |
| Themes | | | | |
| Interchangeable covers | | | | |
| Voice dial | | | | |
| Speakerphone | | | | |
| Recorder | | | | |
| Vibrations | | | | |