Screen size
1B (2022)Winner: 5.5"+67%
OT-S521A1.8"
Quick verdict
1B (2022) leads the measured specs 14-1.
Measured wins
1B (2022)
14
spec wins
Overall winner
Ties
2
equal specs
OT-S521A
1
spec wins
Screen size
Technology
1B (2022)
GSM / HSPA / LTE
OT-S521A
GSM
2G bands
1B (2022)
GSM 850 / 900 / 1800 / 1900
OT-S521A
GSM 850 / 1900
3G bands
1B (2022)
HSDPA 850 / 900 / 1900 / 2100
OT-S521A
-
4G bands
1B (2022)
1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - 5031D, 5031G, 2, 3, 4, 5, 7, 8, 12, 13, 17, 26, 28, 38, 40, 66 - 5031A, 5041J
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
SD card
Stereo speakers
OT-S521A
-
Speed
1B (2022)
HSPA 42.2/11.1 Mbps, LTE Cat4 150/50 Mbps
OT-S521A
-
GPRS
1B (2022)
-
OT-S521A
Class 10
EDGE
1B (2022)
-
OT-S521A
No
Announced
1B (2022)
2022, May 31
OT-S521A
2008. Released 2008
Status
1B (2022)
Available. Released 2022, May 31
OT-S521A
Discontinued
Dimensions
1B (2022)
146.7 x 71.9 x 10 mm (5.78 x 2.83 x 0.39 in)
OT-S521A
103.5 x 44.9 x 10.9 mm (4.07 x 1.77 x 0.43 in)
Weight
1B (2022)
172 g (6.07 oz)
OT-S521A
83 g (2.93 oz)
SIM
1B (2022)
· Nano-SIM· Nano-SIM + Nano-SIM
OT-S521A
Mini-SIM
Type
1B (2022)
TFT LCD
OT-S521A
STN
Size
1B (2022)
5.5 inches, 78.1 cm2 (~74.0% screen-to-body ratio)
OT-S521A
1.8 inches, 10.2 cm2 (~21.9% screen-to-body ratio)
Resolution
1B (2022)
720 x 1440 pixels, 18:9 ratio (~293 ppi density)
OT-S521A
128 x 160 pixels (~114 ppi density)
OS
1B (2022)
Android 11 (Go edition)
OT-S521A
-
Chipset
1B (2022)
Mediatek MT6761 Helio A22 (12 nm)
OT-S521A
-
CPU
1B (2022)
Quad-core 2.0 GHz Cortex-A53
OT-S521A
-
GPU
1B (2022)
PowerVR GE8300
OT-S521A
-
Card slot
1B (2022)
microSDXC (dedicated slot)
OT-S521A
No
Internal
1B (2022)
32GB 2GB RAM
OT-S521A
2MB
Other
1B (2022)
eMMC 5.1
OT-S521A
-
Phonebook
1B (2022)
-
OT-S521A
800 entries
Call records
1B (2022)
-
OT-S521A
20 dialed, 20 received, 20 missed calls
Single
1B (2022)
8 MP, f/2.0, 25 mm (wide), 1/4.0", 1.12µm, AF
OT-S521A
VGA
Features
1B (2022)
LED flash, HDR, panorama
OT-S521A
-
Video
1B (2022)
1080p@30fps
OT-S521A
No
Single
1B (2022)
5 MP, f/2.2, 24 mm (wide), 1/5.0", 1.12µm
OT-S521A
-
Video
1B (2022)
1080p@30fps
OT-S521A
-
Other
1B (2022)
-
OT-S521A
No
Loudspeaker
1B (2022)
Yes
OT-S521A
Yes
3.5mm jack
1B (2022)
Yes
OT-S521A
No
WLAN
1B (2022)
Wi-Fi 802.11 b/g/n, Wi-Fi Direct
OT-S521A
No
Bluetooth
1B (2022)
5.0, A2DP
OT-S521A
No
Positioning
1B (2022)
GPS
OT-S521A
No
NFC
1B (2022)
No
OT-S521A
-
Radio
1B (2022)
FM radio
OT-S521A
No
USB
1B (2022)
microUSB 2.0
OT-S521A
miniUSB 2.0
Sensors
1B (2022)
Accelerometer
OT-S521A
Messaging
1B (2022)
-
OT-S521A
SMS, MMS
Browser
1B (2022)
-
OT-S521A
WAP 2.0/xHTML
Games
1B (2022)
-
OT-S521A
2
Java
1B (2022)
-
OT-S521A
No
Other
1B (2022)
-
OT-S521A
MP3/AAC+ player Organizer Voice memo Predictive text input
Type
1B (2022)
Li-Ion 3000 mAh battery, removable
OT-S521A
Removable Li-Ion 750 mAh battery
Stand-by
1B (2022)
-
OT-S521A
Up to 400 h
Talk time
1B (2022)
-
OT-S521A
Up to 10 h
Colors
1B (2022)
Prime Black, Atlantic Blue
OT-S521A
Dark grey, Cherry red
Models
1B (2022)
5031D, 5031G, 5031A, 5031J
OT-S521A
-
Price
1B (2022)
About 100 EUR
OT-S521A
-
SAR
1B (2022)
-
OT-S521A
1.15 W/kg (head) 1.17 W/kg (body)