Screen size
iQOO 15TWinner: 6.8"+0.1%
X300 Ultra6.8"
Quick verdict
X300 Ultra leads the measured specs 6-4.
Measured wins
iQOO 15T
4
spec wins
Ties
12
equal specs
X300 Ultra
6
spec wins
Overall winner
Screen size
Technology
iQOO 15T
GSM / HSPA / LTE / 5G
X300 Ultra
GSM / HSPA / LTE / 5G
2G bands
iQOO 15T
GSM 850 / 900 / 1800 / 1900
X300 Ultra
GSM 850 / 900 / 1800 / 1900
3G bands
iQOO 15T
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
X300 Ultra
HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100
4G bands
iQOO 15T
LTE
Resolution
Refresh rate
equal specsPeak brightness
Pixel density
CPU speed
RAM
equal specsStorage
equal specsMain camera
equal specsFront camera
Battery
Wired charging
equal specsWeight
Thickness
IP rating
equal specsWi‑Fi
equal specsBluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
equal specsX300 Ultra
1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 42, 43, 48, 66
5G bands
iQOO 15T
SA/NSA
X300 Ultra
1, 2, 3, 5, 7, 8, 12, 18, 20, 25, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79, 80, 81, 83, 84, 89 SA/NSA
Speed
iQOO 15T
HSPA, LTE, 5G
X300 Ultra
HSPA, LTE, 5G
Announced
iQOO 15T
Not announced yet
X300 Ultra
2026, March 30
Status
iQOO 15T
Rumored
X300 Ultra
Available. Released 2026, April 03
Dimensions
iQOO 15T
163.4 x 76.7 x 8.3 mm (6.43 x 3.02 x 0.33 in)
X300 Ultra
163 x 76.8 x 8.2 mm or 8.5 mm
Weight
iQOO 15T
216 g (7.62 oz)
X300 Ultra
232 g or 237 g (8.18 oz)
Build
iQOO 15T
Glass front, aluminum frame
X300 Ultra
Glass front, glass back, aluminum frame
SIM
iQOO 15T
Nano-SIM + Nano-SIM
X300 Ultra
· Nano-SIM + Nano-SIM + eSIM (max 2 at a time) - International· Nano-SIM + Nano-SIM - China
Other
iQOO 15T
IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) Color-changing rear panel (gray color only)
X300 Ultra
IP68/IP69 dust tight and water resistant (immersible up to 1.5m for 30 min)
Type
iQOO 15T
AMOLED, 1B colors, 144Hz, PWM, Dolby Vision, HDR10+, HDR Vivid
X300 Ultra
LTPO AMOLED, 1B colors, 144Hz, 2160Hz PWM, Dolby Vision, HDR10+, HDR Vivid
Size
iQOO 15T
6.83 inches, 112.6 cm2 (~89.9% screen-to-body ratio)
X300 Ultra
6.82 inches, 113.0 cm2 (~90.3% screen-to-body ratio)
Resolution
iQOO 15T
1260 x 2800 pixels, 20:9 ratio (~450 ppi density)
X300 Ultra
1440 x 3168 pixels (~510 ppi density)
Protection
iQOO 15T
-
X300 Ultra
Armor glass, Mohs level 4
Other
iQOO 15T
-
X300 Ultra
Ultra HDR image support
OS
iQOO 15T
Android 16, OriginOS 6
X300 Ultra
Android 16, OriginOS 6
Chipset
iQOO 15T
MediaTek Dimensity 9500 (3 nm)
X300 Ultra
Qualcomm SM8850-AC Snapdragon 8 Elite Gen 5 (3 nm)
CPU
iQOO 15T
Octa-core (1x4.21 GHz C1-Ultra & 3x3.5 GHz C1-Premium & 4x2.7 GHz C1-Pro)
X300 Ultra
Octa-core (2x4.6 GHz Oryon V3 Phoenix L + 6x3.62 GHz Oryon V3 Phoenix M)
GPU
iQOO 15T
Mali-G1 Ultra MC12
X300 Ultra
Adreno 840
Card slot
iQOO 15T
No
X300 Ultra
No
Internal
iQOO 15T
256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
X300 Ultra
256GB 12GB RAM, 512GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
Other
iQOO 15T
UFS 4.1
X300 Ultra
UFS 4.1
Dual
iQOO 15T
200 MP, (wide), 1/1.56", 0.5µm, PDAF, OIS 50 MP, f/2.1, 15mm (ultrawide), 1/2.76", 0.64µm, AF
X300 Ultra
-
Features
iQOO 15T
LED flash, HDR, panorama
X300 Ultra
Laser AF, color spectrum sensor, Zeiss optics, Zeiss T* lens coating, LED flash, panorama, HDR, 3D LUT import
Video
iQOO 15T
Yes
X300 Ultra
8K@30fps, 4K@24/30/60/120fps (10-bit Log, Dolby Vision HDR), 1080p@30/60/120/240fps, gyro-EIS, HDR10+
Triple
iQOO 15T
-
X300 Ultra
200 MP, f/1.9, 35mm (wide), 1/1.12", 0.7µm, PDAF, gimbal OIS 200 MP, f/2.7, 85mm (periscope telephoto), 1/1.4", 0.56µm, multi-directional PDAF, OIS, 3.7x optical zoom, macro 3.4:1 50 MP, f/2.0, 14mm, 116˚ (ultrawide), 1/1.28", 1.22µm, dual pixel PDAF, OIS Optional add-on zoom lenses: 200mm, 2.35x optical zoom, OIS, Zeiss optics 400mm, 4.7x optical zoom, OIS, Zeiss optics
Single
iQOO 15T
16 MP (wide)
X300 Ultra
50 MP, f/2.5, 24mm (wide), 1/2.76", 0.64µm, AF
Features
iQOO 15T
HDR
X300 Ultra
HDR
Video
iQOO 15T
Yes
X300 Ultra
4K@30/60fps, 1080p@30/60fps, gyro-EIS, HDR
Loudspeaker
iQOO 15T
Yes, with stereo speakers
X300 Ultra
Yes, with stereo speakers
3.5mm jack
iQOO 15T
No
X300 Ultra
No
Other
iQOO 15T
24-bit/192kHz Hi-Res audio
X300 Ultra
24-bit/192kHz Hi-Res audio
WLAN
iQOO 15T
Wi-Fi 802.11 a/b/g/n/ac/6/7, dual-band, Wi-Fi Direct
X300 Ultra
Wi-Fi 802.11 a/b/g/n/ac/6/7, dual-band
Bluetooth
iQOO 15T
6.0, A2DP, LE, aptX HD, aptX Adaptive, aptX Lossless, LHDC 5
X300 Ultra
5.4, A2DP, LE, aptX HD, aptX Adaptive, aptX Lossless, LHDC 5
Positioning
iQOO 15T
GPS (L1+L5), GLONASS (G1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5)
X300 Ultra
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), GLONASS
NFC
iQOO 15T
Yes
X300 Ultra
Yes
Infrared port
iQOO 15T
Yes
X300 Ultra
Yes
Radio
iQOO 15T
No
X300 Ultra
No
USB
iQOO 15T
USB Type-C
X300 Ultra
USB Type-C 3.2, OTG, DisplayPort
Sensors
iQOO 15T
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass
X300 Ultra
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass
Other
iQOO 15T
-
X300 Ultra
Emergency SOS via satellite (calls, messages) - 16GB + 1TB model only
Type
iQOO 15T
Si/C Li-Ion 8000 mAh
X300 Ultra
Si/C Li-Ion 6600 mAh (International) or 6400 mAh (Europe)
Charging
iQOO 15T
100W wired, PPS, PD Bypass charging
X300 Ultra
100W wired, PD, PPS, QC, UFCS 40W wireless Reverse wired Reverse wireless
Colors
iQOO 15T
Gray; other colors
X300 Ultra
Black, Silver, Green
Models
iQOO 15T
-
X300 Ultra
V2547A, V2547DA, V2536A, V2562
Price
iQOO 15T
-
X300 Ultra
€ 1,999.00