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Nokia E51 vs Nokia E90 Communicator

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

Better figure, where one is clearly better

NokiaE51NokiaE90 Communicator
Overview
Released20072007
Display
Screen size2″–
Resolution320 × 240800 × 352
Sharpness200 pixels per inch–
PanelLCDLCD
Display typeActive-matrix TFT with up to 16 million colours; ambient-light sensorInner active-matrix LCD, 800 × 352 pixels and 16 million colours in exact RA-6 level-1/2 service manual. No flexible panel or touch input; physical diagonal omitted because maker evidence read does not establish it.
Cover screen–Outer active-matrix LCD, 240 × 320 pixels and 16 million colours in maker service manual; both displays run the same S60 applications.
Performance
Storage130 MB128 MB
MemoryUp to 130 MB user data storage in the maker specification sheet; physical RAM not verified in the exact maker sheet or guide128 MB internal user storage in GSMArena production test. Installed physical RAM omitted; free runtime memory and flash chip capacity are not interchangeable with user storage.
Storage typeHot-swappable microSD; maker brochure supports up to 4 GBHot-swappable microSD in an external covered slot, confirmed by owner guide. Original level-1/2 maker manual lists maximum 2 GB; later card/firmware support not inferred. Included 512 MB card varies by region.
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 rear autofocus camera with flash in corrected maker level-1/2 issue-2 service manual. Owner guide describes settings and video capture. An earlier level-3/4 module table contains conflicting 5 MP/slide-assembly text and is not used for camera specifications.
Front camera–Secondary QCIF camera for video calling in maker service manual. QCIF video format is not treated as sensor megapixel count.
Video recordingQVGA 320 × 240 at 15 fps, MPEG-4 in GSMArena's exact testUp to VGA 640 × 480 at 30 fps in GSMArena and Mobile Tech Review production tests; qualified as review-confirmed, not an inferred owner-guide frame rate.
Battery and charging
Battery1,050 mAh1,500 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 BP-4L, 1500 mAh in maker level-3/4 battery table, corroborated by production tests. Battery endurance depends on radio and workload; separate reviewers' results retained in review summary.
Wired chargingAC-5 charger through a separate small charger socket; miniUSB does not charge the phone in GSMArena's testSeparate charger connector in exact owner guide, with older compatible chargers through CA-44 adaptor. Mini-USB is documented for data; no charging wattage inferred.
Design
TypeStandardFlip
Weight100 g210 g
Thickness12 mm20 mm
Height × width115 × 46 mm132 × 57 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.132 × 57 × 20 mm and 210 g with BP-4L battery in exact RA-6 manufacturer technical table, corroborated by GSMArena.
MaterialsStainless-steel trim and rear battery cover, with plastic upper rear section–
ColoursBlack Steel, Pink Steel and White SteelMocha and Red in Mobile Tech Review and GSMArena coverage; recovered press compositions show Mocha.
ButtonsNumeric keypad and five-way Navi key; one-touch email, contacts, calendar and home keys; side volume, mute and voice controls; email notification lightOuter phone keypad and Navi control; inner QWERTY keyboard, application shortcuts, display-side call/selection controls and another navigation pad. Side voice/capture keys and infrared port in owner-guide layout.
SpeakersFM Visual Radio and MP3/AAC music playback; no RDS in GSMArena's production testRear loudspeakers and 2.5 mm headset socket; stereo FM radio uses wired headset as antenna in owner guide and production tests.
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 in Mobile Tech Review production test; distinct from earlier Communicators' Series 80.
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.–
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 12 February 2007. Maker planned first deliveries in Q2 and volume worldwide availability in Q3; Nokia annual report confirms actual shipments during 2007. Earliest worldwide retail month remains unresolved, so year precision retained. No predecessor link inferred solely from review comparisons.
Connectivity
Mobile networkEGSM 850/900/1800/1900 and WCDMA 850/2100; HSDPA up to 3.6 Mbit/sGSM 850/900/1800/1900 and WCDMA 2100 in exact RA-6 manual. HSDPA up to 3.6 Mbps downlink in manufacturer technical document; US test received EDGE because its 3G band did not match local networks.
Wi-FiIEEE 802.11g WLAN with internet callingWi-Fi 802.11b/g in Mobile Tech Review production test. Maker guide covers WLAN access-point and security setup.
BluetoothBluetooth 2.0; wireless stereo headset support in maker brochure and A2DP verified in GSMArena's production testBluetooth 2.0 + EDR with A2DP stereo audio in Mobile Tech Review test. Exact owner guide covers pairing, file transfer and remote SIM access.
USBminiUSB data connector and IrDA 115 kbit/s; 2.5 mm headset socket in TechRadar's testMini-USB data connector; maker guide documents PC Suite, modem and memory-card data-transfer modes. No Pop-Port value borrowed from E61/E61i.
PositioningNo internal GPS in TechRadar's test; Nokia Maps can use an optional external receiverIntegrated GPS confirmed by original maker announcement and owner guide. Mobile Tech Review's original test had no assisted GPS and slow fixes; later firmware capability not inferred.

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