Screen size
equal specsmy421z2.0"
my730c2.0"
Quick verdict
my730c leads the measured specs 3-2.
Measured wins
my421z
2
spec wins
Ties
5
equal specs
my730c
3
spec wins
Overall winner
Screen size
equal specsTechnology
my421z
GSM
my730c
GSM / UMTS
2G bands
my421z
GSM 900 / 1800 / 1900
my730c
GSM 900 / 1800 / 1900
GPRS
my421z
Yes
my730c
-
EDGE
my421z
No
my730c
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
equal specsThickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
-
3G bands
my421z
-
my730c
UMTS 2100
Speed
my421z
-
my730c
Yes, 384 kbps
Announced
my421z
2008, September. Released 2008, October
my730c
2008, August. Released 2008, Q4
Status
my421z
Discontinued
my730c
Discontinued
Dimensions
my421z
97 x 46 x 14 mm (3.82 x 1.81 x 0.55 in)
my730c
96 x 49 x 16 mm (3.78 x 1.93 x 0.63 in)
Weight
my421z
95 g (3.35 oz)
my730c
95 g (3.35 oz)
SIM
my421z
Mini-SIM
my730c
Mini-SIM
Type
my421z
TFT, 256K colors
my730c
TFT, 256K colors
Size
my421z
2.0 inches, 12.6 cm2 (~28.2% screen-to-body ratio)
my730c
2.0 inches, 12.4 cm2 (~26.3% screen-to-body ratio)
Resolution
my421z
176 x 220 pixels (~141 ppi density)
my730c
240 x 320 pixels, 4:3 ratio (~200 ppi density)
Other
my421z
-
my730c
Secondary external display Dedicated music keys
Card slot
my421z
microSD (dedicated slot)
my730c
microSD (dedicated slot)
Phonebook
my421z
Yes
my730c
1000 contacts, Photocall
Call records
my421z
20 dialed, 20 received, 20 missed calls
my730c
20 dialed, 20 received, 20 missed calls
Internal
my421z
-
my730c
54MB
Single
my421z
1.3 MP
my730c
2 MP
Video
my421z
Yes
my730c
Yes
Other
my421z
No
my730c
No
Loudspeaker
my421z
No
my730c
Yes
3.5mm jack
my421z
No
my730c
No
WLAN
my421z
No
my730c
No
Bluetooth
my421z
Yes
my730c
Yes
Positioning
my421z
No
my730c
No
Radio
my421z
No
my730c
No
USB
my421z
Proprietary
my730c
miniUSB
Sensors
my421z
my730c
Messaging
my421z
SMS, EMS, MMS
my730c
SMS, MMS
Browser
my421z
WAP 2.0/xHTML
my730c
WAP 2.0/xHTML
Games
my421z
Yes
my730c
Yes
Java
my421z
Yes, MIDP 2.0
my730c
Yes, MIDP 2.0
Other
my421z
MP3/AAC player Predictive text input Organizer
my730c
MP3/MP4 player Organizer Voice memo Predictive text input
Type
my421z
Removable Li-Ion battery
my730c
Removable Li-Ion 920 mAh battery
Stand-by
my421z
Up to 250 h
my730c
Up to 300 h
Talk time
my421z
Up to 3 h 30 min
my730c
Up to 4 h
Colors
my421z
Black, Silver, Pink
my730c
Black