Screen size
my421x1.8"
my501XWinner: 1.9"+5.3%
Quick verdict
my501X leads the measured specs 3-2.
Measured wins
my421x
2
spec wins
Ties
4
equal specs
my501X
3
spec wins
Overall winner
Screen size
Technology
my421x
GSM
my501X
GSM
2G bands
my421x
GSM 900 / 1800
my501X
GSM 900 / 1800 / 1900
GPRS
my421x
Yes
my501X
Class 10
EDGE
my421x
No
my501X
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
my501X
2006, March
Status
my421x
Discontinued
my501X
Discontinued
Dimensions
my421x
107 x 47 x 10 mm (4.21 x 1.85 x 0.39 in)
my501X
100 x 46 x 16.5 mm (3.94 x 1.81 x 0.65 in)
Weight
my421x
81 g (2.86 oz)
my501X
90 g (3.17 oz)
SIM
my421x
Mini-SIM
my501X
Mini-SIM
Type
my421x
CSTN, 65K colors
my501X
TFT, 256K colors
Size
my421x
1.8 inches, 10.2 cm2 (~20.3% screen-to-body ratio)
my501X
1.9 inches, 11.4 cm2 (~24.7% screen-to-body ratio)
Resolution
my421x
128 x 160 pixels (~114 ppi density)
my501X
176 x 220 pixels (~148 ppi density)
Other
my421x
Glossy effect
my501X
-
Card slot
my421x
microSD (dedicated slot)
my501X
miniSD
Phonebook
my421x
Yes
my501X
Yes
Call records
my421x
20 dialed, 20 received, 20 missed calls
my501X
20 dialed, 20 received, 20 missed calls
Internal
my421x
-
my501X
32MB
Single
my421x
1.3 MP
my501X
1.3 MP
Video
my421x
Yes
my501X
Yes
Other
my421x
No
my501X
No
Loudspeaker
my421x
Yes
my501X
No
Alert types
my421x
Vibration; Polyphonic ringtones
my501X
Vibration; Downloadable polyphonic ringtones
3.5mm jack
my421x
No
my501X
No
WLAN
my421x
No
my501X
No
Bluetooth
my421x
Yes
my501X
Yes
Positioning
my421x
No
my501X
No
Radio
my421x
Stereo FM radio, RDS
my501X
No
USB
my421x
Proprietary
my501X
miniUSB
Sensors
my421x
my501X
Messaging
my421x
SMS, MMS
my501X
SMS, EMS,MMS
Browser
my421x
WAP 2.0/xHTML
my501X
WAP 2.0/xHTML
Games
my421x
Yes
my501X
Yes
Java
my421x
Yes, MIDP 2.0
my501X
Yes, MIDP 2.0
Other
my421x
Music player Predictive text input Organizer
my501X
MP3/AAC player Predictive text input Organizer
Type
my421x
Removable Li-Ion battery
my501X
Removable Li-Ion battery
Stand-by
my421x
Up to 220 h
my501X
Up to 250 h
Talk time
my421x
Up to 3 h 40 min
my501X
Up to 3 h 30 min
Colors
my421x
Black
my501X
Black, Silver, White