Screen size
S2 FEWinner: 6.8"+3.7%
Y51a6.6"
Quick verdict
S2 FE leads the measured specs 13-4.
Measured wins
S2 FE
13
spec wins
Overall winner
Ties
5
equal specs
Y51a
4
spec wins
Screen size
Technology
S2 FE
GSM / HSPA / LTE / 5G
Y51a
GSM / HSPA / LTE
2G bands
S2 FE
GSM 850 / 900 / 1800 / 1900
Y51a
GSM 850 / 900 / 1800 / 1900
3G bands
S2 FE
HSDPA 800 / 850 / 900 / 2100
Y51a
HSDPA 850 / 900 / 2100
4G bands
S2 FE
1, 3, 4, 5, 8, 19, 28, 38, 40, 41, 42, 43, 48, 66
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
equal specsStorage
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
Y51a
1, 3, 5, 8, 40
5G bands
S2 FE
1, 3, 5, 8, 28, 38, 40, 41, 48, 66, 77, 78 SA/NSA
Y51a
-
Speed
S2 FE
HSPA, LTE, 5G
Y51a
HSPA, LTE
Announced
S2 FE
2026, October 06
Y51a
2021, January 08
Status
S2 FE
Released Oct 20, 2026
Y51a
Available. Released 2021, January 23
Dimensions
S2 FE
163.9 x 76.5 x 8.6 mm (6.45 x 3.01 x 0.34 in)
Y51a
163.9 x 75.3 x 8.4 mm (6.45 x 2.96 x 0.33 in)
Weight
S2 FE
224 g (7.90 oz)
Y51a
188 g (6.63 oz)
Build
S2 FE
Glass front, plastic frame, plastic back
Y51a
-
SIM
S2 FE
Nano-SIM + Nano-SIM
Y51a
Nano-SIM + Nano-SIM
Other
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
Y51a
-
Type
S2 FE
AMOLED, 1B colors, 120Hz, HDR10+, 1000 nits, 2000 nits (HBM)
Y51a
IPS LCD
Size
S2 FE
6.83 inches, 112.6 cm2 (~89.8% screen-to-body ratio)
Y51a
6.58 inches, 104.3 cm2 (~84.5% screen-to-body ratio)
Resolution
S2 FE
1260 x 2800 pixels, 20:9 ratio (~450 ppi density)
Y51a
1080 x 2408 pixels, 20:9 ratio (~401 ppi density)
OS
S2 FE
Android 16, OriginOS 6
Y51a
Android 11, upgradable to Android 12, Funtouch 12
Chipset
S2 FE
Mediatek Dimensity 7300e (6 nm)
Y51a
Qualcomm SM6115 Snapdragon 662 (11 nm)
CPU
S2 FE
Octa-core (4x2.5 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
Y51a
Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
GPU
S2 FE
Mali-G610
Y51a
Adreno 610
Card slot
S2 FE
No
Y51a
microSDXC (dedicated slot)
Internal
S2 FE
128GB 6GB RAM, 128GB 8GB RAM
Y51a
128GB 6GB RAM, 128GB 8GB RAM
Other
S2 FE
UFS 3.1
Y51a
-
Dual
S2 FE
50 MP, f/1.8, (wide), 1/2.93", PDAF Auxiliary lens
Y51a
-
Features
S2 FE
LED flash, HDR, panorama
Y51a
LED flash, HDR, panorama
Video
S2 FE
Yes
Y51a
4K@30fps, 1080p@30fps, gyro-EIS
Triple
S2 FE
-
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)
Single
S2 FE
32 MP, f/2.0, 22mm (wide)
Y51a
16 MP, f/2.0, (wide), 1/3.06" 1.0µm
Video
S2 FE
1080p@30fps
Y51a
1080p@30fps
Features
S2 FE
-
Y51a
HDR
Loudspeaker
S2 FE
Yes, with stereo speakers
Y51a
Yes
3.5mm jack
S2 FE
No
Y51a
Yes
WLAN
S2 FE
Yes
Y51a
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
S2 FE
5.4, A2DP, LE
Y51a
5.0, A2DP, LE
Positioning
S2 FE
GPS, GALILEO, GLONASS, QZSS, BDS
Y51a
GPS, GLONASS, GALILEO, BDS
NFC
S2 FE
No
Y51a
No
Radio
S2 FE
No
Y51a
FM radio
USB
S2 FE
USB Type-C 2.0, OTG
Y51a
USB Type-C 2.0, OTG
Sensors
S2 FE
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Y51a
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass
Type
S2 FE
Si/C Li-Ion 10000 mAh
Y51a
5000 mAh
Charging
S2 FE
44W wired Reverse wired
Y51a
18W wired, 70% in 67 min
Colors
S2 FE
Stellar Green, Zen White, Titan Black
Y51a
Titanium Sapphire, Crystal Symphony
SAR
S2 FE
1.14 W/kg (head) 1.00 W/kg (body)
Y51a
0.87 W/kg (head) 0.39 W/kg (body)
Price
S2 FE
About 360 EUR
Y51a
About 200 EUR
Models
S2 FE
-
Y51a
V2031