iQOO Z11x vs Y51a

Quick verdict

Which is better?

iQOO Z11x leads the measured specs 12-5.

Measured wins

iQOO Z11x: 12Y51a: 5Ties: 6

Choose iQOO Z11x for

5G support
Wired charging
Front camera

Choose Y51a for

3.5mm jack
SD card
Weight

Biggest differences

5G supportiQOO Z11x

YesvsNo+100%

3.5mm jackY51a

NovsYes+100%

SD cardY51a

NovsYes+100%

iQOO Z11x

vivo

AView Details

Y51a

vivo

BView Details

Head-to-head comparison

iQOO Z11x

12

spec wins

Overall winner

Ties

6

equal specs

Y51a

5

spec wins

Display

Screen size

iQOO Z11x6.8"+2.7%

Y51a6.6"

Specifications Comparison

Network

Technology

iQOO Z11x

GSM / HSPA / LTE / 5G

Y51a

GSM / HSPA / LTE

2G bands

iQOO Z11x

GSM 850 / 900 / 1800 / 1900

Y51a

GSM 850 / 900 / 1800 / 1900

3G bands

iQOO Z11x

HSDPA 850 / 900 / 2100

Y51a

HSDPA 850 / 900 / 2100

4G bands

iQOO Z11x

1, 3, 5, 8, 28, 38, 40, 41

Wired charging

iQOO Z11x

44 Wvs18 W+59%

Resolution

iQOO Z11x1,080 × 2,344 px

Y51a1080 × 2408 px+2.7%

Refresh rate

iQOO Z11x120 Hz

Y51a—

Peak brightness

iQOO Z11x1,200 nits

Y51a—

Pixel density

iQOO Z11x382 ppi

Y51a401 ppi+4.7%

Performance

CPU speed

iQOO Z11xOcta-core (4x2.6 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)+23%

Y51aOcta-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)

RAM

equal specs

iQOO Z11x6.0 GB

Y51a6.0 GB

Storage

equal specs

iQOO Z11x128 GB

Y51a128 GB

Cameras

Main camera

iQOO Z11x50.0 MP+4%

Y51a48.0 MP

Front camera

iQOO Z11x32.0 MP+50%

Y51a16.0 MP

Battery

iQOO Z11x7,200 mAh+31%

Y51a5,000 mAh

Wired charging

iQOO Z11x44 W+59%

Y51a18 W

Build

Weight

iQOO Z11x219 g

Y51a188 g+16%

Thickness

equal specs

iQOO Z11x8.4 mm

Y51a8.4 mm

IP rating

iQOO Z11xIP69/IP68

Y51a—

Connectivity

Wi‑Fi

iQOO Z11xwifi 5

Y51aWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct

Bluetooth

equal specs

iQOO Z11x5

Y51a5.0, A2DP, LE

USB

equal specs

iQOO Z11x2.0

Y51aUSB Type-C 2.0, OTG

5G support

iQOO Z11xYes+100%

Y51aNo

NFC

equal specs

iQOO Z11xNo

Y51aNo

3.5mm jack

iQOO Z11xNo

Y51aYes+100%

SD card

iQOO Z11xNo

Y51aYes+100%

Stereo speakers

iQOO Z11xYes

Y51a—

iQOO Z11xSpecY51a

Display

6.8"+2.7%

Screen size

6.6"

1,080 × 2,344 px

Resolution

1080 × 2408 px+2.7%

120 Hz

Refresh rate

—

1,200 nits

Peak brightness

—

382 ppi

Pixel density

401 ppi+4.7%

Performance

Octa-core (4x2.6 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)+23%

CPU speed

Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)

6.0 GB

RAMequal specs

6.0 GB

128 GB

Storageequal specs

128 GB

Cameras

50.0 MP+4%

Main camera

48.0 MP

32.0 MP+50%

Front camera

16.0 MP

Battery

7,200 mAh+31%

Battery

5,000 mAh

44 W+59%

Wired charging

18 W

Build

219 g

Weight

188 g+16%

8.4 mm

Thicknessequal specs

8.4 mm

IP69/IP68

IP rating

—

Connectivity

wifi 5

Wi‑Fi

Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct

5

Bluetoothequal specs

5.0, A2DP, LE

2.0

USBequal specs

USB Type-C 2.0, OTG

Y51a

1, 3, 5, 8, 40

5G bands

iQOO Z11x

1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA

Y51a

-

Speed

iQOO Z11x

HSPA, LTE, 5G

Y51a

HSPA, LTE

GSM / HSPA / LTE / 5GTechnologyGSM / HSPA / LTE

GSM 850 / 900 / 1800 / 1900 2G bandsGSM 850 / 900 / 1800 / 1900

HSDPA 850 / 900 / 2100 3G bandsHSDPA 850 / 900 / 2100

1, 3, 5, 8, 28, 38, 40, 414G bands1, 3, 5, 8, 40

1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA5G bands-

HSPA, LTE, 5GSpeedHSPA, LTE

Launch

Announced

iQOO Z11x

2026, March 12

Y51a

2021, January 08

Status

iQOO Z11x

Released Mar 2026

Y51a

Available. Released 2021, January 23

2026, March 12Announced2021, January 08

Released Mar 2026StatusAvailable. Released 2021, January 23

Body

Dimensions

iQOO Z11x

166.6 x 78.4 x 8.4 mm (6.56 x 3.09 x 0.33 in)

Y51a

163.9 x 75.3 x 8.4 mm (6.45 x 2.96 x 0.33 in)

Weight

iQOO Z11x

219 g (7.72 oz)

Y51a

188 g (6.63 oz)

Build

iQOO Z11x

Glass front, plastic frame, plastic back

Y51a

-

SIM

iQOO Z11x

Nano-SIM + Nano-SIM

Y51a

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)

Y51a

-

166.6 x 78.4 x 8.4 mm (6.56 x 3.09 x 0.33 in)Dimensions163.9 x 75.3 x 8.4 mm (6.45 x 2.96 x 0.33 in)

219 g (7.72 oz)Weight188 g (6.63 oz)

Glass front, plastic frame, plastic backBuild-

Nano-SIM + Nano-SIMSIMNano-SIM + Nano-SIM

IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min)Other-

Display

Type

iQOO Z11x

IPS LCD, 120Hz, 1200 nits (HBM)

Y51a

IPS LCD

Size

iQOO Z11x

6.76 inches, 112.1 cm2 (~85.8% screen-to-body ratio)

Y51a

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)

Y51a

1080 x 2408 pixels, 20:9 ratio (~401 ppi density)

IPS LCD, 120Hz, 1200 nits (HBM)TypeIPS LCD

6.76 inches, 112.1 cm2 (~85.8% screen-to-body ratio)Size6.58 inches, 104.3 cm2 (~84.5% screen-to-body ratio)

1080 x 2344 pixels, 19.5:9 ratio (~382 ppi density)Resolution1080 x 2408 pixels, 20:9 ratio (~401 ppi density)

Platform

OS

iQOO Z11x

Android 16, OriginOS 6

Y51a

Android 11, upgradable to Android 12, Funtouch 12

Chipset

iQOO Z11x

Mediatek Dimensity 7400 Turbo (4 nm)

Y51a

Qualcomm SM6115 Snapdragon 662 (11 nm)

CPU

iQOO Z11x

Octa-core (4x2.6 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)

Y51a

Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)

GPU

iQOO Z11x

Mali-G615 MC2

Y51a

Adreno 610

Android 16, OriginOS 6OSAndroid 11, upgradable to Android 12, Funtouch 12

Mediatek Dimensity 7400 Turbo (4 nm)ChipsetQualcomm SM6115 Snapdragon 662 (11 nm)

Octa-core (4x2.6 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)CPUOcta-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)

Mali-G615 MC2GPUAdreno 610

Memory

Card slot

iQOO Z11x

No

Y51a

microSDXC (dedicated slot)

Internal

iQOO Z11x

128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM

Y51a

128GB 6GB RAM, 128GB 8GB RAM

Other

iQOO Z11x

UFS 3.1

Y51a

-

NoCard slotmicroSDXC (dedicated slot)

128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAMInternal128GB 6GB RAM, 128GB 8GB RAM

UFS 3.1Other-

Main Camera

Dual

iQOO Z11x

50 MP, (wide), 1/2.93", PDAF Auxiliary lens

Y51a

-

Features

iQOO Z11x

LED flash, HDR, panorama

Y51a

LED flash, HDR, panorama

Video

iQOO Z11x

4K@30fps, 1080p@30fps, gyro-EIS

Y51a

4K@30fps, 1080p@30fps, gyro-EIS

Triple

iQOO Z11x

-

Y51a

48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 120˚, (ultrawide), 1/4.0", 1.12µm 2 MP (macro)

50 MP, (wide), 1/2.93", PDAF Auxiliary lensDual-

LED flash, HDR, panoramaFeaturesLED flash, HDR, panorama

4K@30fps, 1080p@30fps, gyro-EISVideo4K@30fps, 1080p@30fps, gyro-EIS

-Triple48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 120˚, (ultrawide), 1/4.0", 1.12µm 2 MP (macro)

Selfie camera

Single

iQOO Z11x

32 MP, (wide)

Y51a

16 MP, f/2.0, (wide), 1/3.06" 1.0µm

Video

iQOO Z11x

4K@30fps, 1080p@30fps

Y51a

1080p@30fps

Features

iQOO Z11x

-

Y51a

HDR

32 MP, (wide)Single16 MP, f/2.0, (wide), 1/3.06" 1.0µm

4K@30fps, 1080p@30fpsVideo1080p@30fps

-FeaturesHDR

Sound

Loudspeaker

iQOO Z11x

Yes, with stereo speakers

Y51a

Yes

3.5mm jack

iQOO Z11x

No

Y51a

Yes

Yes, with stereo speakersLoudspeakerYes

No3.5mm jackYes

Comms

WLAN

iQOO Z11x

Wi-Fi 802.11 a/b/g/n/ac, dual-band

Y51a

Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct

Bluetooth

iQOO Z11x

5.4, A2DP, LE

Y51a

5.0, A2DP, LE

Positioning

iQOO Z11x

GPS, GALILEO, GLONASS, BDS, QZSS

Y51a

GPS, GLONASS, GALILEO, BDS

NFC

iQOO Z11x

No

Y51a

No

Radio

iQOO Z11x

No

Y51a

FM radio

USB

iQOO Z11x

USB Type-C 2.0, OTG

Y51a

USB Type-C 2.0, OTG

Wi-Fi 802.11 a/b/g/n/ac, dual-bandWLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct

5.4, A2DP, LEBluetooth5.0, A2DP, LE

GPS, GALILEO, GLONASS, BDS, QZSSPositioningGPS, GLONASS, GALILEO, BDS

NoNFCNo

NoRadioFM radio

USB Type-C 2.0, OTGUSBUSB Type-C 2.0, OTG

Features

Sensors

iQOO Z11x

Fingerprint (side-mounted), accelerometer, gyro, proximity, compass

Y51a

Fingerprint (side-mounted), accelerometer, gyro, proximity, compass

Fingerprint (side-mounted), accelerometer, gyro, proximity, compassSensorsFingerprint (side-mounted), accelerometer, gyro, proximity, compass

Battery

Type

iQOO Z11x

Si/C Li-Ion 7200 mAh

Y51a

5000 mAh

Charging

iQOO Z11x

44W wired, PPS, 50% in 43 min Reverse wired Bypass Charging

Y51a

18W wired, 70% in 67 min

Si/C Li-Ion 7200 mAhType5000 mAh

44W wired, PPS, 50% in 43 min Reverse wired Bypass ChargingCharging18W wired, 70% in 67 min

Misc

Colors

iQOO Z11x

Prismatic Green, Titan Black

Y51a

Titanium Sapphire, Crystal Symphony

Models

iQOO Z11x

I2507

Y51a

V2031

SAR

iQOO Z11x

-

Y51a

0.87 W/kg (head) 0.39 W/kg (body)

Price

iQOO Z11x

-

Y51a

About 200 EUR

Prismatic Green, Titan BlackColorsTitanium Sapphire, Crystal Symphony

I2507ModelsV2031

-SAR0.87 W/kg (head) 0.39 W/kg (body)

-PriceAbout 200 EUR

Yes+100%

5G support

No

NFCequal specs

No

3.5mm jack

Yes+100%

No

SD card

Yes+100%

Yes

Stereo speakers

—