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Nokia E51 vs Nokia E66

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

NokiaE51NokiaE66
Overview
Released20072008
Display
Screen size2″2.4″
Resolution320 × 240320 × 240
Sharpness200 pixels per inch167 pixels per inch
PanelLCDLCD
Display typeActive-matrix TFT with up to 16 million colours; ambient-light sensor2.4-inch 320 × 240 LCD with up to 16 million colours in the maker datasheet; TFT identified in GSMArena's production test. The physical screen is portrait-oriented; resolution is stored long side first for comparison.
Display features–Ambient light sensor and accelerometer-driven portrait/landscape rotation; non-touchscreen
Performance
Chip–ARM11 369 MHz (GSMArena)
Memory–128 MB
Storage130 MB110 MB
CPU–369 MHz ARM11 processor identified by GSMArena's exact-model production review
MemoryUp to 130 MB user data storage in the maker specification sheet; physical RAM not verified in the exact maker sheet or guide128 MB installed SDRAM from GSMArena, distinct from free application memory. Maker publishes up to 110 MB internal user memory; the configuration records that user-accessible capacity.
Storage typeHot-swappable microSD; maker brochure supports up to 4 GBmicroSD expansion up to 8 GB in the maker launch sheet; optional card capacity is not built-in storage
Cameras
Main camera2 MP3.2 MP
Ultra wide cameraNoneNone
Telephoto cameraNoneNone
Optical zoomNoneNone
Main cameraFixed-focus 2 MP without flash in GSMArena's camera-equipped production test3.2 MP autofocus camera with LED flash; maker gives up to 2048 × 1536 still pixels
Front camera–Front camera for video calls confirmed by maker; no sensor megapixel figure inferred
Video recordingQVGA 320 × 240 at 15 fps, MPEG-4 in GSMArena's exact testMaker specifies QVGA video; GSMArena's production test records 320 × 240 at 15 fps
Camera features–Dedicated shutter key; scene, white-balance, exposure, self-timer and sequence controls in GSMArena's production test. Its tested software does not geotag photos.
Battery and charging
Battery1,050 mAh1,000 mAh
Wireless chargingNoneNone
Battery life detailRemovable BP-6MT. Maker brochure gives 1050 mAh, up to 4.4 hours GSM talk and 13 days GSM standby. GSMArena itself inconsistently gives 1050 mAh in its package description and 1070 mAh in its battery section; headline retains the maker figure.Removable BL-4U 1000 mAh Li-Ion. Maker maxima are 7.5 hours GSM or 3.5 hours WCDMA talk, and 11 days GSM or 14 days WCDMA standby. These are network operating conditions, not video-playback claims. GSMArena's stationary GPS/display-on test lasts six hours.
Wired chargingAC-5 charger through a separate small charger socket; miniUSB does not charge the phone in GSMArena's testSeparate charging connector; compatible Nokia charger. No charging wattage published in the maker datasheet; micro-USB data support does not establish USB charging.
Design
TypeStandardStandard
Weight100 g121 g
Thickness12 mm13 mm
Height × width115 × 46 mm107 × 49 mm
Weight detailMaker brochure gives 100 g and 115 × 47 × 12 mm. Headline width follows TechRadar's exact-model 46 mm and GSMArena's 114.8 × 46 × 12 mm production description; the brochure's 47 mm conflicts with both.Maker launch sheet rounds size to 107 × 49 × 13 mm and gives 121 g. GSMArena measures/lists 107.5 × 49.5 × 13.6 mm; that greater precision is review evidence, not a silently substituted maker claim.
MaterialsStainless-steel trim and rear battery cover, with plastic upper rear sectionStainless-steel rear cover and slider body; numeric keypad slides out below the display. This is a mechanical slider, not a folding or flexible-display phone.
ColoursBlack Steel, Pink Steel and White SteelGrey Steel and White Steel in original maker launch sheet; regional availability varies
ButtonsNumeric keypad and five-way Navi key; one-touch email, contacts, calendar and home keys; side volume, mute and voice controls; email notification lightNumeric keypad, navigation control and one-touch Home, Calendar, Contacts and Email keys; dedicated shutter and side volume controls
Sensors–Accelerometer and ambient light sensor
SpeakersFM Visual Radio and MP3/AAC music playback; no RDS in GSMArena's production testBuilt-in loudspeaker and FM/Visual Radio; GSMArena reports no RDS. Compatible wired headset serves as radio antenna.
Software
Operating systemSymbianSymbian
Software at launchSymbian OS 9.2 with S60 Third Edition Feature Pack 1Symbian OS 9.2, S60 Third Edition Feature Pack 1, identified by GSMArena's production review
Software featuresQuickoffice document viewing, PDF reader, ZIP manager, Team Suite and Active notes. Maker brochure mentions attachment editors, but supplied Quickoffice does not edit in GSMArena's production test; editing requires the separate editor version. Historical enterprise email and internet-call services may no longer operate.Business/personal home-screen profiles; Mail for Exchange, Nokia Intellisync and POP/IMAP email. PDF reader, ZIP manager and office-document viewing; editing required a Quickoffice upgrade in GSMArena's test, whereas TechRadar describes document creation. Exact tested software/upgrade status differs between reports. Historical online services may no longer operate.
Release detailAnnounced 18 September 2007 with planned fourth-quarter availability; Nokia's actual fourth-quarter results confirm first shipments during that quarter. Earliest retail month unresolved, so year precision retained. E50 comparison remains available without an inferred manufacturer successor link.Announced 16 June 2008 alongside E71, with July shipments forecast. Nokia's 2008 annual report confirms actual E66 shipments during that year; earliest worldwide retail month remains unresolved. No speculative E65 predecessor relation added while that model is absent.
In the box–GSMArena's tested package contains a compact charger, 2.5 mm headset, leather case and 2 GB microSD card with maps; regional contents may differ
Connectivity
Mobile networkEGSM 850/900/1800/1900 and WCDMA 850/2100; HSDPA up to 3.6 Mbit/sQuad-band GSM/EGSM 850/900/1800/1900; separate WCDMA 900/2100, 850/2100 and 850/1900 variants, not one five-band handset. HSDPA up to 3.6 Mbps; WCDMA up to 384 kbps down/up. No LTE.
Wi-FiIEEE 802.11g WLAN with internet callingIEEE 802.11b/g
BluetoothBluetooth 2.0; wireless stereo headset support in maker brochure and A2DP verified in GSMArena's production testBluetooth 2.0 with EDR and A2DP stereo audio
USBminiUSB data connector and IrDA 115 kbit/s; 2.5 mm headset socket in TechRadar's testMicro-USB and infrared; separate 2.5 mm AV/headset connector. GSMArena describes USB 2.0 compatibility; no Hi-Speed rate inferred from that label.
PositioningNo internal GPS in TechRadar's test; Nokia Maps can use an optional external receiverBuilt-in GPS with assisted GPS and Nokia Maps; original reviews describe temporary/subscription-based voice guidance. Historical online map services are not promised available today.

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