Screen size
EF512.2"
P51Winner: 2.8"+21%
Quick verdict
P51 leads the measured specs 4-2.
Measured wins
EF51
2
spec wins
Ties
5
equal specs
P51
4
spec wins
Overall winner
Screen size
Technology
EF51
GSM
P51
GSM
2G bands
EF51
GSM 900 / 1800 / 1900 , GSM 850 / 1800 / 1900 - US version
P51
GSM 850 / 900 / 1800 / 1900
GPRS
EF51
Class 10
P51
Class 10
EDGE
EF51
No
P51
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
No
Announced
EF51
2006, February
P51
2006, March
Status
EF51
Discontinued
P51
Discontinued
Dimensions
EF51
89 x 49 x 18 mm (3.50 x 1.93 x 0.71 in)
P51
122 x 60 x 20 mm, 130 cc (4.80 x 2.36 x 0.79 in)
Weight
EF51
95 g (3.35 oz)
P51
170 g (6.00 oz)
SIM
EF51
Mini-SIM
P51
Mini-SIM
Keyboard
EF51
-
P51
QWERTY
Type
EF51
TFT, 256K colors
P51
TFT resistive touchscreen, 256K colors
Size
EF51
2.2 inches, 40 x 40 mm, 15.6 cm2 (~35.7% screen-to-body ratio)
P51
2.8 inches, 42 x 57 mm, 24.3 cm2 (~33.2% screen-to-body ratio)
Resolution
EF51
120 x 128 pixels (~80 ppi density)
P51
240 x 320 pixels, 4:3 ratio (~143 ppi density)
Other
EF51
-
P51
5-way navigation stick
Card slot
EF51
miniSD
P51
MMC/SDIO
Phonebook
EF51
Yes, Photo call
P51
-
Call records
EF51
10 dialed, 10 received, 10 missed calls
P51
-
Internal
EF51
20MB
P51
64MB RAM, 192MB ROM
Single
EF51
1.3 MP
P51
1.3 MP
Video
EF51
No
P51
QCIF
Other
EF51
No
P51
No
Loudspeaker
EF51
No
P51
Yes
Alert types
EF51
Vibration; Downloadable polyphonic, MP3 ringtones
P51
Vibration; Downloadable polyphonic, MP3 ringtones
3.5mm jack
EF51
No
P51
No
Other
EF51
3D surround sound
P51
-
WLAN
EF51
No
P51
Wi-Fi 802.11b/g, VoIP via Wi-Fi
Bluetooth
EF51
1.2, A2DP
P51
1.2, A2DP
Positioning
EF51
No
P51
GPS
Radio
EF51
FM radio
P51
No
USB
EF51
Proprietary
P51
Proprietary
Sensors
EF51
P51
Messaging
EF51
SMS, MMS
P51
-
Browser
EF51
WAP 2.0/xHTML
P51
WAP 2.0/xHTML, HTML
Games
EF51
Yes + downloadable
P51
-
Java
EF51
Yes, MIDP 2.0
P51
-
Other
EF51
WMA/MP3/AAC/AAC+ player Predictive text input Voice memo Stopwatch Organizer
P51
MP3/MP4 player Handwriting recognition Pocket Office Voice command
Type
EF51
Removable Li-Ion 870 mAh battery
P51
Removable Li-Ion 1370 mAh battery
Stand-by
EF51
Up to 200 h
P51
Up to 150 h
Talk time
EF51
Up to 4 h
P51
Up to 4 h
Colors
EF51
Flashy White, Black
P51
OS
EF51
-
P51
Microsoft Windows Mobile 5.0 PocketPC
CPU
EF51
-
P51
32-bit Intel XScale PXA272 416 MHz