Screen size
A51—
CX75Winner: 1.9"
Quick verdict
CX75 leads the measured specs 8-1.
Measured wins
A51
1
spec wins
Ties
2
equal specs
CX75
8
spec wins
Overall winner
Screen size
Technology
A51
GSM
CX75
GSM
2G bands
A51
GSM 900 / 1800
CX75
GSM 900 / 1800 / 1900
GPRS
A51
CX75
Class 10
EDGE
A51
No
CX75
No
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
Stereo speakers
Announced
A51
2004, Q4
CX75
2005, Q1
Status
A51
Discontinued
CX75
Discontinued
Dimensions
A51
103 x 46 x 21 mm, 75 cc (4.06 x 1.81 x 0.83 in)
CX75
112 x 48 x 19 mm, 90 cc (4.41 x 1.89 x 0.75 in)
Weight
A51
84 g (2.96 oz)
CX75
98 g (3.46 oz)
SIM
A51
Mini-SIM
CX75
Mini-SIM
Type
A51
Monochrome graphic
CX75
TFT, 256K colors
Size
A51
CX75
1.9 inches, 28 x 38 mm, 11.2 cm2 (~20.8% screen-to-body ratio)
Resolution
A51
101 x 64 pixels, 5 lines
CX75
132 x 176 pixels, 4:3 ratio (~116 ppi density)
Other
A51
Screensavers
CX75
-
Card slot
A51
No
CX75
RS-MMC
Phonebook
A51
50 entries
CX75
1000 x 20 fields, Photo call
Call records
A51
10 dialed, 10 received, 10 missed calls
CX75
10 dialed, 10 received, 10 missed calls
Internal
A51
-
CX75
14MB
Other
A51
No
CX75
-
Loudspeaker
A51
No
CX75
Yes
Alert types
A51
Downloadable polyphonic ringtones
CX75
Vibration; Downloadable polyphonic, MP3 ringtones
3.5mm jack
A51
No
CX75
No
WLAN
A51
No
CX75
No
Bluetooth
A51
No
CX75
1.2
Positioning
A51
No
CX75
No
Radio
A51
No
CX75
No
USB
A51
CX75
Proprietary
Infrared port
A51
-
CX75
Yes
Sensors
A51
CX75
Messaging
A51
SMS, EMS
CX75
SMS, MMS, EMail, Instant Messaging
Browser
A51
WAP 1.2.1
CX75
WAP 2.0/xHTML
Games
A51
Stack Attack and Wacko
CX75
Yes + downloadable
Java
A51
No
CX75
Yes, MIDP 2.0
Other
A51
Predictive text input Currency converter Calculator Exchangable covers
CX75
Push and Talk MP3/AAC player Predictive text input Organizer SyncML
Type
A51
Removable Li-Ion 700 mAh battery
CX75
Removable Li-Ion 750 mAh battery
Stand-by
A51
Up to 250 h
CX75
Up to 250 h
Talk time
A51
Up to 5 h
CX75
Up to 5 h
Colors
A51
Urban Grey
CX75
Titan grey, Sand silver
Single
A51
-
CX75
1.3 MP
Video
A51
-
CX75
QCIF
Other
A51
-
CX75
No