Screen size
Galaxy Tab S12 UltraWinner: 14.6"+76%
Rex 90 S52923.5"
Quick verdict
Galaxy Tab S12 Ultra leads the measured specs 19-2.
Measured wins
Galaxy Tab S12 Ultra
19
spec wins
Overall winner
Ties
2
equal specs
Rex 90 S5292
2
spec wins
Screen size
Technology
Galaxy Tab S12 Ultra
GSM / HSPA / LTE / 5G
Rex 90 S5292
GSM
2G bands
Galaxy Tab S12 Ultra
GSM 850 / 900 / 1800 / 1900
Rex 90 S5292
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
Galaxy Tab S12 Ultra
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
Rex 90 S5292
-
4G bands
Galaxy Tab S12 Ultra
LTE
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
NFC
equal specs3.5mm jack
SD card
equal specsStereo speakers
Rex 90 S5292
-
5G bands
Galaxy Tab S12 Ultra
SA/NSA/Sub6
Rex 90 S5292
-
Speed
Galaxy Tab S12 Ultra
HSPA, LTE, 5G - cellular model only
Rex 90 S5292
-
GPRS
Galaxy Tab S12 Ultra
-
Rex 90 S5292
Yes
EDGE
Galaxy Tab S12 Ultra
-
Rex 90 S5292
Yes
Announced
Galaxy Tab S12 Ultra
2026, September 30
Rex 90 S5292
2013, February. Released 2013, March
Status
Galaxy Tab S12 Ultra
Released Oct 7, 2026
Rex 90 S5292
Discontinued
Dimensions
Galaxy Tab S12 Ultra
326.3 x 208.5 x 5.1 mm (12.85 x 8.21 x 0.20 in)
Rex 90 S5292
113 x 61.9 x 11.9 mm (4.45 x 2.44 x 0.47 in)
Weight
Galaxy Tab S12 Ultra
692 g or 695 g (1.53 lb)
Rex 90 S5292
-
Build
Galaxy Tab S12 Ultra
Glass front, aluminum frame, aluminum back
Rex 90 S5292
-
SIM
Galaxy Tab S12 Ultra
Nano-SIM + eSIM (cellular model only)
Rex 90 S5292
Dual SIM (Mini-SIM)
Other
Galaxy Tab S12 Ultra
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) Stylus support Enhanced Armor Aluminum
Rex 90 S5292
-
Type
Galaxy Tab S12 Ultra
Dynamic AMOLED 2X, 120Hz, HDR10+, 1000 nits (HBM), 1600 nits (peak)
Rex 90 S5292
TFT, 256K colors
Size
Galaxy Tab S12 Ultra
14.6 inches, 617.8 cm2 (~90.8% screen-to-body ratio)
Rex 90 S5292
3.5 inches, 36.5 cm2 (~52.1% screen-to-body ratio)
Resolution
Galaxy Tab S12 Ultra
1848 x 2960 pixels, 16:10 ratio (~239 ppi density)
Rex 90 S5292
320 x 480 pixels, 3:2 ratio (~165 ppi density)
OS
Galaxy Tab S12 Ultra
Android 17, up to 7 major OS updates, One UI 9
Rex 90 S5292
-
Chipset
Galaxy Tab S12 Ultra
MediaTek Dimensity 9500 (3 nm)
Rex 90 S5292
-
CPU
Galaxy Tab S12 Ultra
Octa-core (1x4.21 GHz C1-Ultra & 3x3.5 GHz C1-Premium & 4x2.7 GHz C1-Pro)
Rex 90 S5292
-
GPU
Galaxy Tab S12 Ultra
Mali-G1 Ultra MC12
Rex 90 S5292
-
Card slot
Galaxy Tab S12 Ultra
microSDXC (dedicated slot)
Rex 90 S5292
microSDHC (dedicated slot)
Internal
Galaxy Tab S12 Ultra
256GB 12GB RAM, 512GB 12GB RAM, 1TB 16GB RAM
Rex 90 S5292
10MB
Other
Galaxy Tab S12 Ultra
UFS
Rex 90 S5292
-
Phonebook
Galaxy Tab S12 Ultra
-
Rex 90 S5292
Yes
Call records
Galaxy Tab S12 Ultra
-
Rex 90 S5292
Yes
Dual
Galaxy Tab S12 Ultra
13 MP, f/2.0, 26mm (wide), 1/3.4", 1.0µm, AF 8 MP, f/2.2, (ultrawide)
Rex 90 S5292
-
Features
Galaxy Tab S12 Ultra
LED flash, HDR, panorama
Rex 90 S5292
-
Video
Galaxy Tab S12 Ultra
4K@30fps, 1080p@30fps
Rex 90 S5292
Yes
Single
Galaxy Tab S12 Ultra
-
Rex 90 S5292
3.15 MP
Single
Galaxy Tab S12 Ultra
12 MP, f/2.4, 120˚ (ultrawide)
Rex 90 S5292
-
Features
Galaxy Tab S12 Ultra
HDR
Rex 90 S5292
-
Video
Galaxy Tab S12 Ultra
4K@30fps, 1080p@30fps
Rex 90 S5292
-
Other
Galaxy Tab S12 Ultra
-
Rex 90 S5292
No
Loudspeaker
Galaxy Tab S12 Ultra
Yes, with stereo speakers (4 speakers)
Rex 90 S5292
Yes
3.5mm jack
Galaxy Tab S12 Ultra
No
Rex 90 S5292
Yes
WLAN
Galaxy Tab S12 Ultra
Wi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi Direct
Rex 90 S5292
Wi-Fi 802.11 b/g/n
Bluetooth
Galaxy Tab S12 Ultra
6.0, A2DP, LE
Rex 90 S5292
3.0
Positioning
Galaxy Tab S12 Ultra
GPS, GLONASS, BDS, GALILEO
Rex 90 S5292
No
NFC
Galaxy Tab S12 Ultra
No
Rex 90 S5292
No
Radio
Galaxy Tab S12 Ultra
No
Rex 90 S5292
FM radio, recording
USB
Galaxy Tab S12 Ultra
USB Type-C 3.2, magnetic connector
Rex 90 S5292
microUSB 2.0, OTG
Sensors
Galaxy Tab S12 Ultra
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Rex 90 S5292
Proximity
Other
Galaxy Tab S12 Ultra
Wireless Samsung DeX (desktop experience support)
Rex 90 S5292
SNS applications MP4/H.263 player MP3/eAAC+/WAV player Organizer Predictive text input
Messaging
Galaxy Tab S12 Ultra
-
Rex 90 S5292
SMS, MMS, Email, IM
Games
Galaxy Tab S12 Ultra
-
Rex 90 S5292
Yes
Java
Galaxy Tab S12 Ultra
-
Rex 90 S5292
Yes
Type
Galaxy Tab S12 Ultra
Li-Po 11600 mAh
Rex 90 S5292
Li-Ion 1000 mAh, removable
Charging
Galaxy Tab S12 Ultra
45W wired, 100% in 95 min
Rex 90 S5292
-
Talk time
Galaxy Tab S12 Ultra
-
Rex 90 S5292
Up to 15 h
Colors
Galaxy Tab S12 Ultra
Gray, Silver
Rex 90 S5292
White, Brown
Models
Galaxy Tab S12 Ultra
SM-X940, SM-X946
Rex 90 S5292
GT-S5292
SAR EU
Galaxy Tab S12 Ultra
0.47 W/kg (body)
Rex 90 S5292
0.50 W/kg (head) 0.46 W/kg (body)
Price
Galaxy Tab S12 Ultra
About 1570 EUR
Rex 90 S5292
About 80 EUR
SAR
Galaxy Tab S12 Ultra
-
Rex 90 S5292
1.01 W/kg (head) 0.49 W/kg (body)