Screen size
Fire 5 UltraWinner: 6.6"+0.3%
S100 Pro6.6"
Quick verdict
S100 Pro leads the measured specs 10-5.
Measured wins
Fire 5 Ultra
5
spec wins
Ties
7
equal specs
S100 Pro
10
spec wins
Overall winner
Screen size
Technology
Fire 5 Ultra
GSM / HSPA / LTE
S100 Pro
GSM / CDMA / HSPA / LTE
2G bands
Fire 5 Ultra
GSM 850 / 900 / 1800 / 1900
S100 Pro
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900
3G bands
Fire 5 Ultra
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
S100 Pro
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
Fire 5 Ultra
1, 2, 3, 4, 5, 7, 8, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 66
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
equal specsMain camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
equal specsWi‑Fi
Bluetooth
equal specsUSB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
S100 Pro
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 66, 71
Speed
Fire 5 Ultra
HSPA, LTE
S100 Pro
HSPA, LTE
Announced
Fire 5 Ultra
2025, December
S100 Pro
2023, May 28
Status
Fire 5 Ultra
Available. Released 2025, December
S100 Pro
Available. Released 2023, June 01
Dimensions
Fire 5 Ultra
176.5 x 82.5 x 18.7 mm (6.95 x 3.25 x 0.74 in)
S100 Pro
178.5 x 83.1 x 27.3 mm (7.03 x 3.27 x 1.07 in)
Weight
Fire 5 Ultra
395 g (13.93 oz)
S100 Pro
-
SIM
Fire 5 Ultra
Nano-SIM + Nano-SIM
S100 Pro
Nano-SIM + Nano-SIM
Other
Fire 5 Ultra
IP68/IP69K dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) Drop resistant up to 1.5m MIL-STD-810H compliant Dedicated flashlight (on the back)
S100 Pro
IP68/IP69K dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) Drop resistant up to 1.5m MIL-STD-810H compliant Flashlight (130 lumens)
Type
Fire 5 Ultra
IPS LCD, 90Hz, 400 nits
S100 Pro
IPS LCD
Size
Fire 5 Ultra
6.6 inches, 104.6 cm2 (~71.9% screen-to-body ratio)
S100 Pro
6.58 inches, 104.3 cm2 (~70.3% screen-to-body ratio)
Resolution
Fire 5 Ultra
720 x 1612 pixels, 20:9 ratio (~267 ppi density)
S100 Pro
1080 x 2408 pixels, 20:9 ratio (~401 ppi density)
Protection
Fire 5 Ultra
Mohs level 6
S100 Pro
Corning Gorilla Glass 5
OS
Fire 5 Ultra
Android 15
S100 Pro
Android 12
Chipset
Fire 5 Ultra
Mediatek Helio G81 (12 nm)
S100 Pro
Mediatek Helio G99 (6 nm)
CPU
Fire 5 Ultra
Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
S100 Pro
Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU
Fire 5 Ultra
Mali-G52 MC2
S100 Pro
Mali-G57 MC2
Card slot
Fire 5 Ultra
microSDXC (dedicated slot)
S100 Pro
microSDXC (uses shared SIM slot)
Internal
Fire 5 Ultra
256GB 8GB RAM
S100 Pro
256GB 12GB RAM
Other
Fire 5 Ultra
-
S100 Pro
UFS 3.1
Single
Fire 5 Ultra
48 MP, f/1.8, (wide), AF
S100 Pro
-
Features
Fire 5 Ultra
Dual-LED flash, HDR, panorama
S100 Pro
Dual-LED flash, HDR, panorama
Video
Fire 5 Ultra
1440p@30fps
S100 Pro
1440p, 1080p
Triple
Fire 5 Ultra
-
S100 Pro
108 MP, f/1.8, (wide), 1/1.52", 0.7µm, PDAF 20 MP, f/1.8, (night vision), 2 infrared night vision lights 16 MP, f/2.2, 130˚ (ultrawide)
Single
Fire 5 Ultra
8 MP, f/2.0, (wide)
S100 Pro
32 MP, f/2.0, (wide), 1/2.8", 0.8µm
Video
Fire 5 Ultra
1080p@30fps
S100 Pro
1440p, 1080p
Loudspeaker
Fire 5 Ultra
Yes
S100 Pro
Yes, with stereo speakers
3.5mm jack
Fire 5 Ultra
No
S100 Pro
No
Other
Fire 5 Ultra
-
S100 Pro
24-bit/192kHz Hi-Res audio
WLAN
Fire 5 Ultra
Wi-Fi 802.11 a/b/g/n/ac, dual-band
S100 Pro
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
Fire 5 Ultra
5.0, A2DP, LE
S100 Pro
5.0, A2DP, LE
Positioning
Fire 5 Ultra
GPS, GLONASS, GALILEO, BDS
S100 Pro
GPS (L1+L5), GLONASS, BDS, GALILEO
NFC
Fire 5 Ultra
Yes
S100 Pro
Yes (market/region dependent)
Radio
Fire 5 Ultra
FM radio
S100 Pro
FM radio
USB
Fire 5 Ultra
USB Type-C
S100 Pro
USB Type-C 2.0, OTG
Sensors
Fire 5 Ultra
Fingerprint (side-mounted), accelerometer, proximity, compass
S100 Pro
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass
Type
Fire 5 Ultra
13000 mAh
S100 Pro
22000 mAh
Charging
Fire 5 Ultra
18W wired
S100 Pro
33W wired
Colors
Fire 5 Ultra
Gray, Orange, Green
S100 Pro
Black, Black/Silver, Black/Gold
Price
Fire 5 Ultra
About 250 EUR
S100 Pro
About 300 EUR