Screen size
my421zWinner: 2.0"+5%
my521x1.9"
Quick verdict
my421z leads the measured specs 3-2.
Measured wins
my421z
3
spec wins
Overall winner
Ties
4
equal specs
my521x
2
spec wins
Screen size
Technology
my421z
GSM
my521x
GSM
2G bands
my421z
GSM 900 / 1800 / 1900
my521x
GSM 900 / 1800 / 1900
GPRS
my421z
Yes
my521x
Yes
EDGE
my421z
No
my521x
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
No
Announced
my421z
2008, September. Released 2008, October
my521x
2008, July
Status
my421z
Discontinued
my521x
Discontinued
Dimensions
my421z
97 x 46 x 14 mm (3.82 x 1.81 x 0.55 in)
my521x
107 x 46 x 10 mm (4.21 x 1.81 x 0.39 in)
Weight
my421z
95 g (3.35 oz)
my521x
90 g (3.17 oz)
SIM
my421z
Mini-SIM
my521x
Mini-SIM
Type
my421z
TFT, 256K colors
my521x
TFT, 65K colors
Size
my421z
2.0 inches, 12.6 cm2 (~28.2% screen-to-body ratio)
my521x
1.9 inches, 11.4 cm2 (~23.1% screen-to-body ratio)
Resolution
my421z
176 x 220 pixels (~141 ppi density)
my521x
128 x 160 pixels (~108 ppi density)
Card slot
my421z
microSD (dedicated slot)
my521x
microSD (dedicated slot)
Phonebook
my421z
Yes
my521x
Yes
Call records
my421z
20 dialed, 20 received, 20 missed calls
my521x
20 dialed, 20 received, 20 missed calls
Internal
my421z
-
my521x
10MB
Single
my421z
1.3 MP
my521x
1.3 MP
Video
my421z
Yes
my521x
Yes
Other
my421z
No
my521x
No
Loudspeaker
my421z
No
my521x
No
3.5mm jack
my421z
No
my521x
No
Alert types
my421z
-
my521x
Vibration; Polyphonic(32) ringtones
WLAN
my421z
No
my521x
No
Bluetooth
my421z
Yes
my521x
Yes
Positioning
my421z
No
my521x
No
Radio
my421z
No
my521x
No
USB
my421z
Proprietary
my521x
Proprietary
Sensors
my421z
my521x
Messaging
my421z
SMS, EMS, MMS
my521x
SMS, EMS, MMS
Browser
my421z
WAP 2.0/xHTML
my521x
WAP 2.0/xHTML
Games
my421z
Yes
my521x
Yes
Java
my421z
Yes, MIDP 2.0
my521x
Yes, MIDP 2.0
Other
my421z
MP3/AAC player Predictive text input Organizer
my521x
MP3/AAC player Predictive text input Organizer
Type
my421z
Removable Li-Ion battery
my521x
Removable Li-Ion battery
Stand-by
my421z
Up to 250 h
my521x
Up to 200 h
Talk time
my421z
Up to 3 h 30 min
my521x
Up to 3 h
Colors
my421z
Black, Silver, Pink
my521x
Black,Silver