Screen size
iQOO U3x Standard6.5"
S2 FEWinner: 6.8"+4.7%
Quick verdict
S2 FE leads the measured specs 14-4.
Measured wins
iQOO U3x Standard
4
spec wins
Ties
4
equal specs
S2 FE
14
spec wins
Overall winner
Screen size
Technology
iQOO U3x Standard
GSM / CDMA / HSPA / CDMA2000 / LTE
S2 FE
GSM / HSPA / LTE / 5G
2G bands
iQOO U3x Standard
GSM 850 / 900 / 1800 / 1900 , CDMA 800
S2 FE
GSM 850 / 900 / 1800 / 1900
3G bands
iQOO U3x Standard
HSDPA 850 / 900 / 1900 / 2100 , CDMA2000 1x
S2 FE
HSDPA 800 / 850 / 900 / 2100
4G bands
iQOO U3x Standard
1, 3, 5, 8, 34, 38, 39, 40, 41
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
equal specsMain camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
NFC
equal specs3.5mm jack
SD card
Stereo speakers
S2 FE
1, 3, 4, 5, 8, 19, 28, 38, 40, 41, 42, 43, 48, 66
Speed
iQOO U3x Standard
HSPA, LTE
S2 FE
HSPA, LTE, 5G
5G bands
iQOO U3x Standard
-
S2 FE
1, 3, 5, 8, 28, 38, 40, 41, 48, 66, 77, 78 SA/NSA
Announced
iQOO U3x Standard
2021, June 07
S2 FE
2026, October 06
Status
iQOO U3x Standard
Available. Released 2021, June 09
S2 FE
Released Oct 20, 2026
Dimensions
iQOO U3x Standard
164.4 x 76.3 x 8.4 mm (6.47 x 3.00 x 0.33 in)
S2 FE
163.9 x 76.5 x 8.6 mm (6.45 x 3.01 x 0.34 in)
Weight
iQOO U3x Standard
191.4 g (6.74 oz)
S2 FE
224 g (7.90 oz)
Build
iQOO U3x Standard
Glass front, plastic back, plastic frame
S2 FE
Glass front, plastic frame, plastic back
SIM
iQOO U3x Standard
Nano-SIM + Nano-SIM
S2 FE
Nano-SIM + Nano-SIM
Other
iQOO U3x Standard
-
S2 FE
IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min) MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions
Type
iQOO U3x Standard
IPS LCD
S2 FE
AMOLED, 1B colors, 120Hz, HDR10+, 1000 nits, 2000 nits (HBM)
Size
iQOO U3x Standard
6.51 inches, 102.3 cm2 (~81.6% screen-to-body ratio)
S2 FE
6.83 inches, 112.6 cm2 (~89.8% screen-to-body ratio)
Resolution
iQOO U3x Standard
720 x 1600 pixels, 20:9 ratio (~270 ppi density)
S2 FE
1260 x 2800 pixels, 20:9 ratio (~450 ppi density)
OS
iQOO U3x Standard
Android 11, OriginOS 1.0 for iQOO
S2 FE
Android 16, OriginOS 6
Chipset
iQOO U3x Standard
Mediatek MT6769V/CU Helio G80 (12 nm)
S2 FE
Mediatek Dimensity 7300e (6 nm)
CPU
iQOO U3x Standard
Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
S2 FE
Octa-core (4x2.5 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
GPU
iQOO U3x Standard
Mali-G52 MC2
S2 FE
Mali-G610
Card slot
iQOO U3x Standard
microSDXC (dedicated slot)
S2 FE
No
Internal
iQOO U3x Standard
128GB 4GB RAM, 128GB 6GB RAM
S2 FE
128GB 6GB RAM, 128GB 8GB RAM
Other
iQOO U3x Standard
eMMC 5.1
S2 FE
UFS 3.1
Dual
iQOO U3x Standard
13 MP, f/2.2, (wide), PDAF Auxiliary lens
S2 FE
50 MP, f/1.8, (wide), 1/2.93", PDAF Auxiliary lens
Features
iQOO U3x Standard
LED flash, HDR
S2 FE
LED flash, HDR, panorama
Video
iQOO U3x Standard
1080p@30fps
S2 FE
Yes
Single
iQOO U3x Standard
8 MP, f/1.8, (wide)
S2 FE
32 MP, f/2.0, 22mm (wide)
Video
iQOO U3x Standard
1080p@30fps
S2 FE
1080p@30fps
Loudspeaker
iQOO U3x Standard
Yes
S2 FE
Yes, with stereo speakers
3.5mm jack
iQOO U3x Standard
Yes
S2 FE
No
WLAN
iQOO U3x Standard
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
S2 FE
Yes
Bluetooth
iQOO U3x Standard
5.0, A2DP, LE, aptX
S2 FE
5.4, A2DP, LE
Positioning
iQOO U3x Standard
GPS, GLONASS, GALILEO, BDS
S2 FE
GPS, GALILEO, GLONASS, QZSS, BDS
NFC
iQOO U3x Standard
No
S2 FE
No
Radio
iQOO U3x Standard
No
S2 FE
No
USB
iQOO U3x Standard
microUSB 2.0, OTG
S2 FE
USB Type-C 2.0, OTG
Sensors
iQOO U3x Standard
Fingerprint (side-mounted), accelerometer, proximity, compass
S2 FE
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Type
iQOO U3x Standard
5000 mAh
S2 FE
Si/C Li-Ion 10000 mAh
Charging
iQOO U3x Standard
18W wired
S2 FE
44W wired Reverse wired
Colors
iQOO U3x Standard
Black, Silver
S2 FE
Stellar Green, Zen White, Titan Black
Models
iQOO U3x Standard
V2143A
S2 FE
-
Price
iQOO U3x Standard
About 120 EUR
S2 FE
About 360 EUR
SAR
iQOO U3x Standard
-
S2 FE
1.14 W/kg (head) 1.00 W/kg (body)