Screen size
equal specsGO 201.8"
GO 211.8"
Quick verdict
GO 21 leads the measured specs 3-2.
Measured wins
GO 20
2
spec wins
Ties
7
equal specs
GO 21
3
spec wins
Overall winner
Screen size
equal specsTechnology
GO 20
GSM
GO 21
GSM
2G bands
GO 20
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
GO 21
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
GPRS
GO 20
Up to 48 kbps
GO 21
Up to 48 kbps
EDGE
GO 20
No
GO 21
Resolution
equal specsRefresh rate
Peak brightness
Pixel density
equal specsCPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
5G support
equal specsNFC
equal specs3.5mm jack
SD card
equal specsStereo speakers
No
Announced
GO 20
2013, November. Released 2013, November
GO 21
2014, May. Released 2014, June
Status
GO 20
Discontinued
GO 21
Discontinued
Dimensions
GO 20
101 x 43.8 x 14 mm (3.98 x 1.72 x 0.55 in)
GO 21
105 x 44.9 x 14.2 mm (4.13 x 1.77 x 0.56 in)
Weight
GO 20
60 g (2.12 oz)
GO 21
66 g (2.33 oz)
SIM
GO 20
Dual SIM (Mini-SIM)
GO 21
Dual SIM (Mini-SIM)
Other
GO 20
Flashlight
GO 21
-
Type
GO 20
TFT, 65K colors
GO 21
TFT, 65K colors
Size
GO 20
1.8 inches, 10.2 cm2 (~23.0% screen-to-body ratio)
GO 21
1.8 inches, 10.2 cm2 (~21.6% screen-to-body ratio)
Resolution
GO 20
128 x 160 pixels (~114 ppi density)
GO 21
128 x 160 pixels (~114 ppi density)
Card slot
GO 20
microSDHC (dedicated slot)
GO 21
microSDHC
Phonebook
GO 20
Yes
GO 21
Yes
Call records
GO 20
Yes
GO 21
Yes
Internal
GO 20
32Mb 32Mb RAM
GO 21
32Mb 32Mb RAM
Single
GO 20
VGA
GO 21
VGA
Video
GO 20
GO 21
Other
GO 20
No
GO 21
No
Loudspeaker
GO 20
Yes
GO 21
Yes
3.5mm jack
GO 20
No
GO 21
Yes
WLAN
GO 20
No
GO 21
No
Bluetooth
GO 20
2.1
GO 21
2.1, EDR
Positioning
GO 20
No
GO 21
No
NFC
GO 20
No
GO 21
No
Radio
GO 20
Stereo FM radio
GO 21
Stereo FM radio
USB
GO 20
Proprietary
GO 21
microUSB 2.0
Sensors
GO 20
GO 21
Messaging
GO 20
SMS, MMS, IM
GO 21
SMS, MMS, IM
Games
GO 20
Yes
GO 21
Yes
Java
GO 20
No
GO 21
No
Other
GO 20
Whatsapp messenger Video/music player Organizer Predictive text input
GO 21
Whatsapp messenger Video/music player Organizer Predictive text input
Type
GO 20
Li-Ion 500 mAh, removable
GO 21
Li-Ion 650 mAh, removable
Stand-by
GO 20
Up to 200 h
GO 21
Up to 200 h
Talk time
GO 20
Up to 6 h
GO 21
Up to 6 h
Colors
GO 20
Black, White, Silver, Purple, Blue, Red
GO 21
Black, Orange, Gray, Red, Green, Blue