Screen size
X21 UD6.3"
Y05eWinner: 6.7"+6.8%
Quick verdict
X21 UD leads the measured specs 10-6.
Measured wins
X21 UD
10
spec wins
Overall winner
Ties
6
equal specs
Y05e
6
spec wins
Screen size
Technology
X21 UD
GSM / CDMA / HSPA / LTE
Y05e
GSM / HSPA / LTE
2G bands
X21 UD
GSM 850 / 900 / 1800 / 1900 , CDMA 800 & TD-SCDMA
Y05e
GSM 850 / 900 / 1800 / 1900
3G bands
X21 UD
HSDPA 850 / 900 / 1900 / 2100
Y05e
HSDPA 850 / 900 / 2100
4G bands
X21 UD
1, 2, 3, 5, 8, 34, 38, 39, 40, 41
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Y05e
1, 3, 5, 7, 8, 20, 28, 38, 40, 41
Speed
X21 UD
HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Y05e
HSPA, LTE
Announced
X21 UD
2018, March. Released 2018, March
Y05e
2026, July
Status
X21 UD
Discontinued
Y05e
Available. Released 2026, July
Dimensions
X21 UD
154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in)
Y05e
167.3 x 77 x 8.2 mm (6.59 x 3.03 x 0.32 in)
Weight
X21 UD
156.2 g (5.50 oz)
Y05e
199 g (7.02 oz)
Build
X21 UD
Glass front (Gorilla Glass 3), aluminum back, aluminum frame
Y05e
Glass front, plastic frame, plastic back
SIM
X21 UD
Nano-SIM + Nano-SIM
Y05e
Nano-SIM + Nano-SIM
Other
X21 UD
-
Y05e
IP64 dust tight and water resistant (water splashes) MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions
Type
X21 UD
Super AMOLED
Y05e
IPS LCD, 90Hz, 570 nits (HBM)
Size
X21 UD
6.28 inches, 98.4 cm2 (~85.2% screen-to-body ratio)
Y05e
6.74 inches, 109.7 cm2 (~85.1% screen-to-body ratio)
Resolution
X21 UD
1080 x 2280 pixels, 19:9 ratio (~402 ppi density)
Y05e
720 x 1600 pixels, 20:9 ratio (~260 ppi density)
Protection
X21 UD
Corning Gorilla Glass 3
Y05e
-
OS
X21 UD
Android 8.1 (Oreo), Funtouch 4
Y05e
Android 16, OriginOS 6
Chipset
X21 UD
Qualcomm SDM660 Snapdragon 660 (14 nm)
Y05e
Unisoc T7225 (12 nm)
CPU
X21 UD
Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
Y05e
Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
GPU
X21 UD
Adreno 512
Y05e
Mali-G52 MP1
Card slot
X21 UD
microSDXC (uses shared SIM slot)
Y05e
microSDXC (dedicated slot)
Internal
X21 UD
128GB 6GB RAM
Y05e
64GB 4GB RAM
Other
X21 UD
eMMC 5.1
Y05e
eMMC 5.1
Dual
X21 UD
12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF Auxiliary lens
Y05e
-
Features
X21 UD
LED flash, HDR, panorama
Y05e
LED flash, panorama
Video
X21 UD
1080p@30fps
Y05e
1080p@30fps
Single
X21 UD
-
Y05e
8 MP, f/2.0 (wide)
Single
X21 UD
12 MP, f/2.0, (wide), 1/2.8", 1.28µm
Y05e
5 MP, f/2.2, (wide)
Video
X21 UD
1080p@30fps
Y05e
Yes
Loudspeaker
X21 UD
Yes
Y05e
Yes
3.5mm jack
X21 UD
Yes
Y05e
Yes
Other
X21 UD
32-bit/192kHz Hi-Res audio
Y05e
-
WLAN
X21 UD
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Y05e
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
X21 UD
5.0, A2DP, LE
Y05e
5.2, A2DP, LE
Positioning
X21 UD
GPS, GLONASS
Y05e
GPS, GALILEO, GLONASS, QZSS, BDS
NFC
X21 UD
No
Y05e
No
Radio
X21 UD
FM radio
Y05e
FM radio
USB
X21 UD
microUSB 2.0, OTG
Y05e
USB Type-C 2.0, OTG
Sensors
X21 UD
Fingerprint (under display, optical), accelerometer, proximity, compass
Y05e
Fingerprint (side-mounted), accelerometer, proximity, compass
Type
X21 UD
Li-Ion 3200 mAh, non-removable
Y05e
Li-Ion 5150 mAh
Charging
X21 UD
18W wired
Y05e
15W wired Reverse wired
Colors
X21 UD
Black, Ruby Red
Y05e
Teal, Black
Models
X21 UD
X21UD A
Y05e
-
Price
X21 UD
About 550 EUR
Y05e
About 120 EUR
SAR
X21 UD
-
Y05e
1.14 W/kg (head) 1.12 W/kg (body)