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Nokia E51 vs Nokia E61

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

Better figure, where one is clearly better

NokiaE51NokiaE61
Overview
Released20072006
Display
Screen size2″2.8″
Resolution320 × 240320 × 240
Sharpness200 pixels per inch143 pixels per inch
PanelLCDLCD
Display typeActive-matrix TFT with up to 16 million colours; ambient-light sensor2.8-inch non-touchscreen landscape LCD, 320 × 240 pixels and 16 million colours in OSnews production review. The Japanese X01NK carrier announcement describes a 2.8-inch TFT but only 262,000 colours; that planned regional specification is not transferred to the original E61.
Performance
Storage130 MB64 MB
MemoryUp to 130 MB user data storage in the maker specification sheet; physical RAM not verified in the exact maker sheet or guideUp to 64 MB fixed internal user storage in the reproduced Nokia specification at NokiaMuseum, corroborated by production reviews. Installed RAM and CPU are omitted because the maker sources read do not establish them; user storage is not physical RAM.
Storage typeHot-swappable microSD; maker brochure supports up to 4 GBHot-swappable miniSD under the removable rear cover, confirmed by exact owner guide. OSnews and The Register received a 64 MB card; this removable card is distinct from internal storage. No maximum inferred from later E61i microSD specifications.
Cameras
Main camera2 MPNone
Ultra wide cameraNoneNone
Telephoto cameraNoneNone
Optical zoomNoneNone
Main cameraFixed-focus 2 MP without flash in GSMArena's camera-equipped production testNo camera in both full production reviews; later E61i is a separate camera-equipped model.
Front camera–No video-call camera. Exact owner guide and OSnews describe receiving video calls and sending a static image, subject to network support.
Video recordingQVGA 320 × 240 at 15 fps, MPEG-4 in GSMArena's exact test–
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.User-replaceable BP-5L, 1500 mAh identified by OSnews and the reproduced NokiaMuseum specification. OSnews achieved over seven hours of GSM talk with UMTS disabled; The Register used its test unit from Friday morning to Monday evening. These are attributed tests, not comparable maker video-playback claims.
Wired chargingAC-5 charger through a separate small charger socket; miniUSB does not charge the phone in GSMArena's testSeparate charger socket; exact issue-4 guide specifies wall charging and compatible older Nokia chargers through a CA-44 adaptor. OSnews confirms no USB charging. No charging wattage published in maker sources read.
Design
TypeStandardStandard
Weight100 g144 g
Thickness12 mm14 mm
Height × width115 × 46 mm117 × 69.7 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.144 g and 117 × 69.7 × 14 mm from OSnews full production review and reproduced NokiaMuseum specification. Later planned Japanese X01NK announcement agrees, but does not establish the original worldwide release date.
MaterialsStainless-steel trim and rear battery cover, with plastic upper rear section–
ColoursBlack Steel, Pink Steel and White SteelSilver in original recovered press photographs; no additional global finish inferred.
ButtonsNumeric keypad and five-way Navi key; one-touch email, contacts, calendar and home keys; side volume, mute and voice controls; email notification lightQWERTY keyboard, joystick, email and menu keys, call/end and soft keys; side volume and voice-recording key, top power key and email indicator light in exact owner guide.
SpeakersFM Visual Radio and MP3/AAC music playback; no RDS in GSMArena's production testBuilt-in loudspeaker and voice recorder confirmed by exact guide. Wired audio uses Pop-Port; no standard headphone socket in production tests.
Software
Operating systemSymbianSymbian
Software at launchSymbian OS 9.2 with S60 Third Edition Feature Pack 1Symbian OS 9.1 with S60 Third Edition in maker deck/reproduced launch release and production reviews.
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.Manufacturer guide includes Word document editing, spreadsheet and presentation tools, file manager and screen export. Original launch supports corporate email clients, mobile VPN, remote management/lock/wipe and VoIP. Functions and online services may no longer be available; early review software faults are qualified in the review summary.
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 October 2005 with Q1 2006 availability planned. Nokia 2006 annual report confirms first Eseries shipments during 2006, while independent production reviews establish actual retail units in 2006. Earliest worldwide retail month remains unresolved, so year precision retained. Later Japanese X01NK planned March 2007 is regional. No direct predecessor link inferred from shared family or secondary database claims.
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 RM-89 manufacturer guide and reproduced launch release. The Register confirms no HSDPA; no LTE. Japanese X01NK carrier bands differ and are not transferred to this original global record.
Wi-FiIEEE 802.11g WLAN with internet callingWi-Fi 802.11g with VoIP support in OSnews production review; exact owner guide describes wireless LAN access-point and security setup. Historical service availability is not promised today.
BluetoothBluetooth 2.0; wireless stereo headset support in maker brochure and A2DP verified in GSMArena's production testBluetooth 1.2 from OSnews production review and reproduced NokiaMuseum specification; exact guide describes paired audio accessories, file transfer and remote SIM mode.
USBminiUSB data connector and IrDA 115 kbit/s; 2.5 mm headset socket in TechRadar's testFull-Speed USB through proprietary Pop-Port in reproduced NokiaMuseum specification. Exact guide confirms Pop-Port for headset/accessories, a separate charger socket and infrared. Launch USB 2.0 compatibility does not establish Hi-Speed transfer.
PositioningNo internal GPS in TechRadar's test; Nokia Maps can use an optional external receiverNo integrated GPS in production-review evidence; external Bluetooth GPS support is separate from an internal receiver.

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