Screen size
GM 830—
t420—
Quick verdict
t420 leads the measured specs 2-1.
Measured wins
GM 830
1
spec wins
Ties
4
equal specs
t420
2
spec wins
Overall winner
Screen size
Technology
GM 830
GSM
t420
GSM
2G bands
GM 830
GSM 900 / 1800
t420
GSM 900 / 1800
GPRS
GM 830
No
t420
Class 8
EDGE
GM 830
No
t420
No
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
equal specsWired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
Announced
GM 830
1999
t420
2005, Q1
Status
GM 830
Discontinued
t420
Discontinued
Dimensions
GM 830
117 x 51 x 20 mm (4.61 x 2.01 x 0.79 in)
t420
62 x 64 x 23 mm (2.44 x 2.52 x 0.91 in)
Weight
GM 830
105 g (3.70 oz)
t420
82 g (2.89 oz)
SIM
GM 830
Mini-SIM
t420
Mini-SIM
Type
GM 830
Monochrome graphic
t420
TFT, 65K colors
Size
GM 830
t420
Resolution
GM 830
4 lines
t420
128 x 160 pixels
Other
GM 830
Dynamic font size Fixed icons Softkeys
t420
Second OLED display, 256 colors, 96 x 64 pixels Downloadable animation
Card slot
GM 830
No
t420
No
Phonebook
GM 830
t420
300 entries, Photocall
Call records
GM 830
10 dialed, 10 received, 10 missed calls
t420
10 received, dialed and missed calls
Other
GM 830
No
t420
-
Loudspeaker
GM 830
No
t420
No
Alert types
GM 830
Vibration; Monophonic ringtones, composer
t420
Vibration; Downloadable polyphonic ringtones, composer
3.5mm jack
GM 830
No
t420
No
WLAN
GM 830
No
t420
No
Bluetooth
GM 830
No
t420
No
Positioning
GM 830
No
t420
No
Radio
GM 830
No
t420
No
USB
GM 830
t420
No
Sensors
GM 830
t420
Messaging
GM 830
SMS
t420
SMS, EMS, MMS
Browser
GM 830
t420
WAP 1.2.1
Clock
GM 830
Yes
t420
-
Alarm
GM 830
Yes
t420
-
Games
GM 830
No
t420
Yes
Java
GM 830
No
t420
No
Other
GM 830
-
t420
Video player Photo editor Predictive text input Organizer
Type
GM 830
Removable Li-Ion 650 mAh battery
t420
Removable Li-Ion 650 mAh battery
Stand-by
GM 830
52 h
t420
Up to 100 h
Talk time
GM 830
4 h
t420
Up to 2 h
Colors
GM 830
4
t420
Black
Single
GM 830
-
t420
VGA
Video
GM 830
-
t420
Yes
Other
GM 830
-
t420
No