Screen size
Go Flip 4Winner: 2.8"+36%
OT-S5201.8"
Quick verdict
Go Flip 4 leads the measured specs 12-2.
Measured wins
Go Flip 4
12
spec wins
Overall winner
Ties
1
equal specs
OT-S520
2
spec wins
Screen size
Technology
Go Flip 4
GSM / HSPA / LTE
OT-S520
GSM
2G bands
Go Flip 4
GSM 850 / 1900
OT-S520
GSM 900 / 1800
3G bands
Go Flip 4
HSDPA 850 / 1700(AWS) / 1900
OT-S520
-
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
5G support
equal specsNFC
3.5mm jack
SD card
Stereo speakers
OT-S520
-
Speed
Go Flip 4
HSPA, LTE
OT-S520
-
GPRS
Go Flip 4
-
OT-S520
Class 10
EDGE
Go Flip 4
-
OT-S520
No
Announced
Go Flip 4
2021, September
OT-S520
2008, February. Released 2009, June
Status
Go Flip 4
Available. Released 2021, September
OT-S520
Discontinued
Dimensions
Go Flip 4
107.3 x 55.6 x 19.9 mm (4.22 x 2.19 x 0.78 in)
OT-S520
103 x 44.9 x 10.9 mm (4.06 x 1.77 x 0.43 in)
Weight
Go Flip 4
133 g (4.69 oz)
OT-S520
69 g (2.43 oz)
SIM
Go Flip 4
Nano-SIM
OT-S520
Mini-SIM
Type
Go Flip 4
TN TFT LCD
OT-S520
STN, 65K colors
Size
Go Flip 4
2.8 inches, 24.3 cm2 (~40.7% screen-to-body ratio)
OT-S520
1.8 inches, 10.2 cm2 (~22.0% screen-to-body ratio)
Resolution
Go Flip 4
240 x 320 pixels, 4:3 ratio (~143 ppi density)
OT-S520
128 x 160 pixels (~114 ppi density)
Other
Go Flip 4
Second external TN TFT display, 1.44 inches, 128 x 128 pixels
OT-S520
Embedded images and animations
OS
Go Flip 4
KaiOS 3.0
OT-S520
-
Chipset
Go Flip 4
QM215 Snapdragon 215 (28 nm)
OT-S520
-
CPU
Go Flip 4
Quad-core 1.3 GHz Cortex-A53
OT-S520
-
GPU
Go Flip 4
Adreno 308
OT-S520
-
Card slot
Go Flip 4
microSDHC (dedicated slot)
OT-S520
No
Internal
Go Flip 4
4GB 512MB RAM
OT-S520
2MB
Phonebook
Go Flip 4
-
OT-S520
800 entries
Call records
Go Flip 4
-
OT-S520
20 dialed, 20 received, 20 missed calls
Single
Go Flip 4
2 MP
OT-S520
VGA
Video
Go Flip 4
480p@30fps
OT-S520
No
Other
Go Flip 4
No
OT-S520
No
Loudspeaker
Go Flip 4
Yes
OT-S520
Yes
3.5mm jack
Go Flip 4
Yes
OT-S520
No
Alert types
Go Flip 4
-
OT-S520
Vibration; Polyphonic(64), MP3 ringtones
WLAN
Go Flip 4
Wi-Fi 802.11 b/g/n, hotspot
OT-S520
No
Bluetooth
Go Flip 4
4.2, A2DP
OT-S520
No
Positioning
Go Flip 4
GPS
OT-S520
No
NFC
Go Flip 4
No
OT-S520
-
Radio
Go Flip 4
FM radio
OT-S520
No
USB
Go Flip 4
USB Type-C 2.0
OT-S520
Proprietary
Sensors
Go Flip 4
OT-S520
Messaging
Go Flip 4
-
OT-S520
SMS, MMS
Browser
Go Flip 4
-
OT-S520
WAP 2.0/xHTML
Games
Go Flip 4
-
OT-S520
2
Java
Go Flip 4
-
OT-S520
No
Other
Go Flip 4
-
OT-S520
Predictive text input Organizer
Type
Go Flip 4
Li-Ion 1850 mAh
OT-S520
Removable Li-Ion 750 mAh battery
Stand-by
Go Flip 4
-
OT-S520
Up to 400 h
Talk time
Go Flip 4
-
OT-S520
Up to 10 h
Colors
Go Flip 4
Midnight Blue
OT-S520
Black/Silver, Black/Red
Models
Go Flip 4
4056W
OT-S520
-
SAR
Go Flip 4
0.78 W/kg (head) 1.27 W/kg (body)
OT-S520
1.15 W/kg (head) 1.17 W/kg (body)
Price
Go Flip 4
About 120 EUR
OT-S520
-
SAR EU
Go Flip 4
-
OT-S520
1.00 W/kg (head)