Screen size
equal specsmy231x1.8"
my312x1.8"
Quick verdict
my231x and my312x are close on the measured specs.
Measured wins
my231x
1
spec wins
Ties
6
equal specs
my312x
1
spec wins
Screen size
equal specsTechnology
my231x
GSM
my312x
GSM
2G bands
my231x
GSM 900 / 1800
my312x
GSM 900 / 1800 / 1900
GPRS
my231x
No
my312x
Yes
EDGE
my231x
No
my312x
No
Resolution
Refresh rate
Peak brightness
Pixel density
equal specsCPU 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
equal specsStereo speakers
Announced
my231x
2008, February. Released 2008
my312x
2008, February. Released 2008
Status
my231x
Discontinued
my312x
Discontinued
Dimensions
my231x
106 x 46 x 12 mm (4.17 x 1.81 x 0.47 in)
my312x
109 x 48 x 11 mm (4.29 x 1.89 x 0.43 in)
Weight
my231x
75 g (2.65 oz)
my312x
87 g (3.07 oz)
SIM
my231x
Mini-SIM
my312x
Mini-SIM
Type
my231x
CSTN, 65K colors
my312x
TFT, 65K colors
Size
my231x
1.8 inches, 10.2 cm2 (~20.9% screen-to-body ratio)
my312x
1.8 inches, 10.2 cm2 (~19.5% screen-to-body ratio)
Resolution
my231x
128 x 160 pixels (~114 ppi density)
my312x
128 x 160 pixels (~114 ppi density)
Card slot
my231x
No
my312x
No
Phonebook
my231x
Yes
my312x
Yes
Call records
my231x
20 dialed, 20 received, 20 missed calls
my312x
20 dialed, 20 received, 20 missed calls
Other
my231x
No
my312x
No
Loudspeaker
my231x
Yes
my312x
Yes
Alert types
my231x
Vibration; Polyphonic ringtones
my312x
Vibration; Polyphonic ringtones
3.5mm jack
my231x
No
my312x
No
WLAN
my231x
No
my312x
No
Bluetooth
my231x
Yes
my312x
Yes
Positioning
my231x
No
my312x
No
Radio
my231x
No
my312x
No
USB
my231x
Proprietary
my312x
Proprietary
Sensors
my231x
my312x
Messaging
my231x
SMS
my312x
SMS, MMS
Browser
my231x
No
my312x
WAP 2.0/xHTML
Games
my231x
Yes
my312x
Yes
Java
my231x
No
my312x
Yes, MIDP 2.0
Other
my231x
Predictive text input Organizer
my312x
Predictive text input Organizer
Type
my231x
Removable Li-Ion battery
my312x
Removable Li-Ion battery
Stand-by
my231x
Up to 450 h
my312x
Up to 220 h
Talk time
my231x
Up to 6 h
my312x
Up to 3 h 40 min
Colors
my231x
Black
my312x
Black