Screen size
my421x1.8"
my421zWinner: 2.0"+10%
Quick verdict
my421z leads the measured specs 3-2.
Measured wins
my421x
2
spec wins
Ties
4
equal specs
my421z
3
spec wins
Overall winner
Screen size
Technology
my421x
GSM
my421z
GSM
2G bands
my421x
GSM 900 / 1800
my421z
GSM 900 / 1800 / 1900
GPRS
my421x
Yes
my421z
Yes
EDGE
my421x
No
my421z
No
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront 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
my421x
2008, February. Released 2008
my421z
2008, September. Released 2008, October
Status
my421x
Discontinued
my421z
Discontinued
Dimensions
my421x
107 x 47 x 10 mm (4.21 x 1.85 x 0.39 in)
my421z
97 x 46 x 14 mm (3.82 x 1.81 x 0.55 in)
Weight
my421x
81 g (2.86 oz)
my421z
95 g (3.35 oz)
SIM
my421x
Mini-SIM
my421z
Mini-SIM
Type
my421x
CSTN, 65K colors
my421z
TFT, 256K colors
Size
my421x
1.8 inches, 10.2 cm2 (~20.3% screen-to-body ratio)
my421z
2.0 inches, 12.6 cm2 (~28.2% screen-to-body ratio)
Resolution
my421x
128 x 160 pixels (~114 ppi density)
my421z
176 x 220 pixels (~141 ppi density)
Other
my421x
Glossy effect
my421z
-
Card slot
my421x
microSD (dedicated slot)
my421z
microSD (dedicated slot)
Phonebook
my421x
Yes
my421z
Yes
Call records
my421x
20 dialed, 20 received, 20 missed calls
my421z
20 dialed, 20 received, 20 missed calls
Single
my421x
1.3 MP
my421z
1.3 MP
Video
my421x
Yes
my421z
Yes
Other
my421x
No
my421z
No
Loudspeaker
my421x
Yes
my421z
No
Alert types
my421x
Vibration; Polyphonic ringtones
my421z
-
3.5mm jack
my421x
No
my421z
No
WLAN
my421x
No
my421z
No
Bluetooth
my421x
Yes
my421z
Yes
Positioning
my421x
No
my421z
No
Radio
my421x
Stereo FM radio, RDS
my421z
No
USB
my421x
Proprietary
my421z
Proprietary
Sensors
my421x
my421z
Messaging
my421x
SMS, MMS
my421z
SMS, EMS, MMS
Browser
my421x
WAP 2.0/xHTML
my421z
WAP 2.0/xHTML
Games
my421x
Yes
my421z
Yes
Java
my421x
Yes, MIDP 2.0
my421z
Yes, MIDP 2.0
Other
my421x
Music player Predictive text input Organizer
my421z
MP3/AAC player Predictive text input Organizer
Type
my421x
Removable Li-Ion battery
my421z
Removable Li-Ion battery
Stand-by
my421x
Up to 220 h
my421z
Up to 250 h
Talk time
my421x
Up to 3 h 40 min
my421z
Up to 3 h 30 min
Colors
my421x
Black
my421z
Black, Silver, Pink