Screen size
t420—
t550—
Quick verdict
t550 leads the measured specs 4-1.
Measured wins
t420
1
spec wins
Ties
4
equal specs
t550
4
spec wins
Overall winner
Screen size
Technology
t420
GSM
t550
GSM
2G bands
t420
GSM 900 / 1800
t550
GSM 900 / 1800 / 1900
GPRS
t420
Class 8
t550
Class 10
EDGE
t420
No
t550
No
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
Announced
t420
2005, Q1
t550
2005, Q1
Status
t420
Discontinued
t550
Discontinued
Dimensions
t420
62 x 64 x 23 mm (2.44 x 2.52 x 0.91 in)
t550
105 x 49.6 x 15.8 mm (4.13 x 1.95 x 0.62 in)
Weight
t420
82 g (2.89 oz)
t550
98 g (3.46 oz)
SIM
t420
Mini-SIM
t550
Mini-SIM
Type
t420
TFT, 65K colors
t550
TFT, 256K colors
Size
t420
t550
Resolution
t420
128 x 160 pixels
t550
128 x 160 pixels
Other
t420
Second OLED display, 256 colors, 96 x 64 pixels Downloadable animation
t550
Downloadable animation
Card slot
t420
No
t550
No
Phonebook
t420
300 entries, Photocall
t550
1000 entries, Photocall
Call records
t420
10 received, dialed and missed calls
t550
10 received, dialed and missed calls
Single
t420
VGA
t550
1.3 MP
Video
t420
Yes
t550
Yes
Features
t420
-
t550
LED flash
Other
t420
No
t550
No
Loudspeaker
t420
No
t550
Yes, with stereo speakers
Alert types
t420
Vibration; Downloadable polyphonic ringtones, composer
t550
Vibration; Downloadable polyphonic, MP3 ringtones, composer
3.5mm jack
t420
No
t550
No
WLAN
t420
No
t550
No
Bluetooth
t420
No
t550
Yes
Positioning
t420
No
t550
No
Radio
t420
No
t550
No
USB
t420
No
t550
Proprietary
Sensors
t420
t550
Messaging
t420
SMS, EMS, MMS
t550
SMS, EMS, MMS
Browser
t420
WAP 1.2.1
t550
WAP 2.0/xHTML
Games
t420
Yes
t550
Yes
Java
t420
No
t550
Yes
Other
t420
Video player Photo editor Predictive text input Organizer
t550
MP3 player Video player Photo editor Predictive text input Organizer
Type
t420
Removable Li-Ion 650 mAh battery
t550
Removable Li-Ion 860 mAh battery
Stand-by
t420
Up to 100 h
t550
Up to 168 h
Talk time
t420
Up to 2 h
t550
Up to 9 h
Colors
t420
Black
t550
Black