Screen size
Go Flip 42.8"
OT-991Winner: 4.0"+30%
Quick verdict
OT-991 leads the measured specs 6-5.
Measured wins
Go Flip 4
5
spec wins
Ties
4
equal specs
OT-991
6
spec wins
Overall winner
Screen size
Technology
Go Flip 4
GSM / HSPA / LTE
OT-991
GSM / HSPA
2G bands
Go Flip 4
GSM 850 / 1900
OT-991
GSM 850 / 900 / 1800 / 1900
3G bands
Go Flip 4
HSDPA 850 / 1700(AWS) / 1900
OT-991
HSDPA 850 / 1900 / 2100 , HSDPA 850 / 1700 / 2100
4G bands
Go Flip 4
2, 4, 5, 12, 25, 26, 41, 66, 71
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
equal specs5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
OT-991
-
Speed
Go Flip 4
HSPA, LTE
OT-991
HSPA 7.2/0.384 Mbps
Announced
Go Flip 4
2021, September
OT-991
2012, February. Released 2012, Q3
Status
Go Flip 4
Available. Released 2021, September
OT-991
Discontinued
Dimensions
Go Flip 4
107.3 x 55.6 x 19.9 mm (4.22 x 2.19 x 0.78 in)
OT-991
122 x 68 x 10.8 mm (4.80 x 2.68 x 0.43 in)
Weight
Go Flip 4
133 g (4.69 oz)
OT-991
131.3 g (4.62 oz)
SIM
Go Flip 4
Nano-SIM
OT-991
Mini-SIM
Type
Go Flip 4
TN TFT LCD
OT-991
TFT, 256K colors
Size
Go Flip 4
2.8 inches, 24.3 cm2 (~40.7% screen-to-body ratio)
OT-991
4.0 inches, 47.6 cm2 (~57.4% screen-to-body ratio)
Resolution
Go Flip 4
240 x 320 pixels, 4:3 ratio (~143 ppi density)
OT-991
320 x 480 pixels, 3:2 ratio (~144 ppi density)
Other
Go Flip 4
Second external TN TFT display, 1.44 inches, 128 x 128 pixels
OT-991
-
OS
Go Flip 4
KaiOS 3.0
OT-991
Android 2.3 (Gingerbread)
Chipset
Go Flip 4
QM215 Snapdragon 215 (28 nm)
OT-991
Mediatek MT6573 (65 nm)
CPU
Go Flip 4
Quad-core 1.3 GHz Cortex-A53
OT-991
800 MHz Cortex-A9
GPU
Go Flip 4
Adreno 308
OT-991
PowerVR SGX531
Card slot
Go Flip 4
microSDHC (dedicated slot)
OT-991
microSDHC (dedicated slot)
Internal
Go Flip 4
4GB 512MB RAM
OT-991
150MB
Single
Go Flip 4
2 MP
OT-991
3.15 MP
Video
Go Flip 4
480p@30fps
OT-991
Yes
Features
Go Flip 4
-
OT-991
LED flash
Other
Go Flip 4
No
OT-991
-
Single
Go Flip 4
-
OT-991
Yes
Video
Go Flip 4
-
OT-991
Loudspeaker
Go Flip 4
Yes
OT-991
Yes
3.5mm jack
Go Flip 4
Yes
OT-991
Yes
WLAN
Go Flip 4
Wi-Fi 802.11 b/g/n, hotspot
OT-991
Wi-Fi 802.11 b/g/n, hotspot
Bluetooth
Go Flip 4
4.2, A2DP
OT-991
4.0, A2DP
Positioning
Go Flip 4
GPS
OT-991
GPS, A-GPS
NFC
Go Flip 4
No
OT-991
-
Radio
Go Flip 4
FM radio
OT-991
Stereo FM radio, RDS
USB
Go Flip 4
USB Type-C 2.0
OT-991
microUSB 2.0
Sensors
Go Flip 4
OT-991
Accelerometer, proximity, compass
Other
Go Flip 4
-
OT-991
MP3/AAC+/WAV/WMA player MP4/H.264 player Document viewer Photo viewer/editor Organizer Voice memo Predictive text input
Type
Go Flip 4
Li-Ion 1850 mAh
OT-991
Removable Li-Ion 1500 mAh battery
Stand-by
Go Flip 4
-
OT-991
Up to 400 h
Talk time
Go Flip 4
-
OT-991
Up to 12 h (2G) / Up to 10 h (3G)
Colors
Go Flip 4
Midnight Blue
OT-991
Black, White
Models
Go Flip 4
4056W
OT-991
-
SAR
Go Flip 4
0.78 W/kg (head) 1.27 W/kg (body)
OT-991
-
Price
Go Flip 4
About 120 EUR
OT-991
About 130 EUR
SAR EU
Go Flip 4
-
OT-991
0.54 W/kg (head) 0.84 W/kg (body)