Screen size
my421x1.8"
my730cWinner: 2.0"+10%
Quick verdict
my730c leads the measured specs 4-3.
Measured wins
my421x
3
spec wins
Ties
3
equal specs
my730c
4
spec wins
Overall winner
Screen size
Technology
my421x
GSM
my730c
GSM / UMTS
2G bands
my421x
GSM 900 / 1800
my730c
GSM 900 / 1800 / 1900
GPRS
my421x
Yes
my730c
-
EDGE
my421x
No
my730c
-
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
equal specsStereo speakers
3G bands
my421x
-
my730c
UMTS 2100
Speed
my421x
-
my730c
Yes, 384 kbps
Announced
my421x
2008, February. Released 2008
my730c
2008, August. Released 2008, Q4
Status
my421x
Discontinued
my730c
Discontinued
Dimensions
my421x
107 x 47 x 10 mm (4.21 x 1.85 x 0.39 in)
my730c
96 x 49 x 16 mm (3.78 x 1.93 x 0.63 in)
Weight
my421x
81 g (2.86 oz)
my730c
95 g (3.35 oz)
SIM
my421x
Mini-SIM
my730c
Mini-SIM
Type
my421x
CSTN, 65K colors
my730c
TFT, 256K colors
Size
my421x
1.8 inches, 10.2 cm2 (~20.3% screen-to-body ratio)
my730c
2.0 inches, 12.4 cm2 (~26.3% screen-to-body ratio)
Resolution
my421x
128 x 160 pixels (~114 ppi density)
my730c
240 x 320 pixels, 4:3 ratio (~200 ppi density)
Other
my421x
Glossy effect
my730c
Secondary external display Dedicated music keys
Card slot
my421x
microSD (dedicated slot)
my730c
microSD (dedicated slot)
Phonebook
my421x
Yes
my730c
1000 contacts, Photocall
Call records
my421x
20 dialed, 20 received, 20 missed calls
my730c
20 dialed, 20 received, 20 missed calls
Internal
my421x
-
my730c
54MB
Single
my421x
1.3 MP
my730c
2 MP
Video
my421x
Yes
my730c
Yes
Other
my421x
No
my730c
No
Loudspeaker
my421x
Yes
my730c
Yes
Alert types
my421x
Vibration; Polyphonic ringtones
my730c
-
3.5mm jack
my421x
No
my730c
No
WLAN
my421x
No
my730c
No
Bluetooth
my421x
Yes
my730c
Yes
Positioning
my421x
No
my730c
No
Radio
my421x
Stereo FM radio, RDS
my730c
No
USB
my421x
Proprietary
my730c
miniUSB
Sensors
my421x
my730c
Messaging
my421x
SMS, MMS
my730c
SMS, MMS
Browser
my421x
WAP 2.0/xHTML
my730c
WAP 2.0/xHTML
Games
my421x
Yes
my730c
Yes
Java
my421x
Yes, MIDP 2.0
my730c
Yes, MIDP 2.0
Other
my421x
Music player Predictive text input Organizer
my730c
MP3/MP4 player Organizer Voice memo Predictive text input
Type
my421x
Removable Li-Ion battery
my730c
Removable Li-Ion 920 mAh battery
Stand-by
my421x
Up to 220 h
my730c
Up to 300 h
Talk time
my421x
Up to 3 h 40 min
my730c
Up to 4 h
Colors
my421x
Black
my730c
Black