Screen size
iQOO Z11xWinner: 6.8"+2.7%
Y55s (2021)6.6"
Quick verdict
iQOO Z11x leads the measured specs 12-5.
Measured wins
iQOO Z11x
12
spec wins
Overall winner
Ties
6
equal specs
Y55s (2021)
5
spec wins
Screen size
Technology
iQOO Z11x
GSM / HSPA / LTE / 5G
Y55s (2021)
GSM / CDMA / HSPA / CDMA2000 / LTE / 5G
2G bands
iQOO Z11x
GSM 850 / 900 / 1800 / 1900
Y55s (2021)
GSM 850 / 900 / 1800 / 1900 , CDMA 800
3G bands
iQOO Z11x
HSDPA 850 / 900 / 2100
Y55s (2021)
HSDPA 850 / 900 / 1700(AWS) / 2100 , CDMA2000 1x
4G bands
iQOO Z11x
1, 3, 5, 8, 28, 38, 40, 41
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
equal specsStorage
equal specsMain camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
SD card
equal specsStereo speakers
Y55s (2021)
1, 3, 4, 5, 8, 28, 34, 38, 39, 40, 41
5G bands
iQOO Z11x
1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA
Y55s (2021)
1, 5, 8, 28, 41, 77, 78 SA/NSA
Speed
iQOO Z11x
HSPA, LTE, 5G
Y55s (2021)
HSPA, LTE, 5G
Announced
iQOO Z11x
2026, March 12
Y55s (2021)
2021, December 04
Status
iQOO Z11x
Released Mar 2026
Y55s (2021)
Available. Released 2021, December 22
Dimensions
iQOO Z11x
166.6 x 78.4 x 8.4 mm (6.56 x 3.09 x 0.33 in)
Y55s (2021)
163.9 x 75.3 x 9.2 mm (6.45 x 2.96 x 0.36 in)
Weight
iQOO Z11x
219 g (7.72 oz)
Y55s (2021)
199.8 g (7.05 oz)
Build
iQOO Z11x
Glass front, plastic frame, plastic back
Y55s (2021)
Glass front, plastic frame, plastic back
SIM
iQOO Z11x
Nano-SIM + Nano-SIM
Y55s (2021)
Nano-SIM + Nano-SIM
Other
iQOO Z11x
IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min)
Y55s (2021)
-
Type
iQOO Z11x
IPS LCD, 120Hz, 1200 nits (HBM)
Y55s (2021)
IPS LCD
Size
iQOO Z11x
6.76 inches, 112.1 cm2 (~85.8% screen-to-body ratio)
Y55s (2021)
6.58 inches, 104.3 cm2 (~84.5% screen-to-body ratio)
Resolution
iQOO Z11x
1080 x 2344 pixels, 19.5:9 ratio (~382 ppi density)
Y55s (2021)
1080 x 2408 pixels, 20:9 ratio (~401 ppi density)
OS
iQOO Z11x
Android 16, OriginOS 6
Y55s (2021)
Android 11, OriginOS
Chipset
iQOO Z11x
Mediatek Dimensity 7400 Turbo (4 nm)
Y55s (2021)
Mediatek Dimensity 700 (7 nm)
CPU
iQOO Z11x
Octa-core (4x2.6 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
Y55s (2021)
Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU
iQOO Z11x
Mali-G615 MC2
Y55s (2021)
Mali-G57 MC2
Card slot
iQOO Z11x
No
Y55s (2021)
No
Internal
iQOO Z11x
128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
Y55s (2021)
128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
Other
iQOO Z11x
UFS 3.1
Y55s (2021)
UFS 2.1
Dual
iQOO Z11x
50 MP, (wide), 1/2.93", PDAF Auxiliary lens
Y55s (2021)
50 MP, f/1.8, 26mm (wide), PDAF 2 MP (macro)
Features
iQOO Z11x
LED flash, HDR, panorama
Y55s (2021)
LED flash, HDR, panorama
Video
iQOO Z11x
4K@30fps, 1080p@30fps, gyro-EIS
Y55s (2021)
1080p@30fps
Single
iQOO Z11x
32 MP, (wide)
Y55s (2021)
8 MP, f/1.8, (wide)
Video
iQOO Z11x
4K@30fps, 1080p@30fps
Y55s (2021)
1080p@30fps
Loudspeaker
iQOO Z11x
Yes, with stereo speakers
Y55s (2021)
Yes
3.5mm jack
iQOO Z11x
No
Y55s (2021)
Yes
WLAN
iQOO Z11x
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Y55s (2021)
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
iQOO Z11x
5.4, A2DP, LE
Y55s (2021)
5.1, A2DP, LE, aptX HD
Positioning
iQOO Z11x
GPS, GALILEO, GLONASS, BDS, QZSS
Y55s (2021)
GPS, GLONASS, GALILEO, BDS, QZSS
NFC
iQOO Z11x
No
Y55s (2021)
No
Radio
iQOO Z11x
No
Y55s (2021)
-
USB
iQOO Z11x
USB Type-C 2.0, OTG
Y55s (2021)
USB Type-C, OTG
Sensors
iQOO Z11x
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass
Y55s (2021)
Fingerprint (side-mounted), accelerometer, proximity, compass
Type
iQOO Z11x
Si/C Li-Ion 7200 mAh
Y55s (2021)
6000 mAh
Charging
iQOO Z11x
44W wired, PPS, 50% in 43 min Reverse wired Bypass Charging
Y55s (2021)
18W wired
Colors
iQOO Z11x
Prismatic Green, Titan Black
Y55s (2021)
Black, Blue, Pink
Models
iQOO Z11x
I2507
Y55s (2021)
V2164A
Price
iQOO Z11x
-
Y55s (2021)
About 210 EUR