Screen size
A31—
CX75Winner: 1.9"
Quick verdict
CX75 leads the measured specs 6-3.
Measured wins
A31
3
spec wins
Ties
2
equal specs
CX75
6
spec wins
Overall winner
Screen size
Technology
A31
GSM
CX75
GSM
2G bands
A31
GSM 900 / 1800 , GSM 850 / 1900 - US version
CX75
GSM 900 / 1800 / 1900
GPRS
A31
Class 8
CX75
Class 10
EDGE
A31
No
CX75
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
No
Announced
A31
2005, November
CX75
2005, Q1
Status
A31
Discontinued
CX75
Discontinued
Dimensions
A31
102 x 46 x 17.6 mm, 75 cc (4.02 x 1.81 x 0.69 in)
CX75
112 x 48 x 19 mm, 90 cc (4.41 x 1.89 x 0.75 in)
Weight
A31
85 g (3.00 oz)
CX75
98 g (3.46 oz)
SIM
A31
Mini-SIM
CX75
Mini-SIM
Type
A31
CSTN, 65K colors
CX75
TFT, 256K colors
Size
A31
CX75
1.9 inches, 28 x 38 mm, 11.2 cm2 (~20.8% screen-to-body ratio)
Resolution
A31
128 x 128 pixels, 1:1 ratio
CX75
132 x 176 pixels, 4:3 ratio (~116 ppi density)
Card slot
A31
No
CX75
RS-MMC
Phonebook
A31
Yes
CX75
1000 x 20 fields, Photo call
Call records
A31
10 dialed, 10 received, 10 missed calls
CX75
10 dialed, 10 received, 10 missed calls
Internal
A31
1.5MB
CX75
14MB
Other
A31
No
CX75
-
Loudspeaker
A31
Yes
CX75
Yes
Alert types
A31
Vibration; Polyphonic(32) ringtones
CX75
Vibration; Downloadable polyphonic, MP3 ringtones
3.5mm jack
A31
No
CX75
No
WLAN
A31
No
CX75
No
Bluetooth
A31
No
CX75
1.2
Positioning
A31
No
CX75
No
Radio
A31
No
CX75
No
USB
A31
No
CX75
Proprietary
Infrared port
A31
-
CX75
Yes
Sensors
A31
CX75
Messaging
A31
SMS, EMS, MMS
CX75
SMS, MMS, EMail, Instant Messaging
Browser
A31
WAP 1.2.1
CX75
WAP 2.0/xHTML
Games
A31
Yes + downloadable
CX75
Yes + downloadable
Java
A31
Yes, MIDP 1.0
CX75
Yes, MIDP 2.0
Other
A31
Predictive text input Organizer
CX75
Push and Talk MP3/AAC player Predictive text input Organizer SyncML
Type
A31
Removable Li-Ion 820 mAh battery
CX75
Removable Li-Ion 750 mAh battery
Stand-by
A31
Up to 270 h
CX75
Up to 250 h
Talk time
A31
Up to 5 h
CX75
Up to 5 h
Colors
A31
Anthracite, Ruby Red
CX75
Titan grey, Sand silver
Single
A31
-
CX75
1.3 MP
Video
A31
-
CX75
QCIF
Other
A31
-
CX75
No