Screen size
S2 FEWinner: 6.8"+7.8%
Z3i6.3"
Quick verdict
S2 FE leads the measured specs 14-4.
Measured wins
S2 FE
14
spec wins
Overall winner
Ties
4
equal specs
Z3i
4
spec wins
Screen size
Technology
S2 FE
GSM / HSPA / LTE / 5G
Z3i
GSM / CDMA / HSPA / LTE
2G bands
S2 FE
GSM 850 / 900 / 1800 / 1900
Z3i
GSM 850 / 900 / 1800 / 1900 , CDMA 800 / 1900 & TD-SCDMA
3G bands
S2 FE
HSDPA 800 / 850 / 900 / 2100
Z3i
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
USB
equal specs5G support
NFC
equal specs3.5mm jack
SD card
Stereo speakers
Z3i
1, 3, 5, 8, 34, 38, 39, 40, 41
5G bands
S2 FE
1, 3, 5, 8, 28, 38, 40, 41, 48, 66, 77, 78 SA/NSA
Z3i
-
Speed
S2 FE
HSPA, LTE, 5G
Z3i
HSPA, LTE
Announced
S2 FE
2026, October 06
Z3i
2018, October. Released 2018, October
Status
S2 FE
Released Oct 20, 2026
Z3i
Discontinued
Dimensions
S2 FE
163.9 x 76.5 x 8.6 mm (6.45 x 3.01 x 0.34 in)
Z3i
156 x 75.6 x 8.1 mm (6.14 x 2.98 x 0.32 in)
Weight
S2 FE
224 g (7.90 oz)
Z3i
164 g (5.78 oz)
Build
S2 FE
Glass front, plastic frame, plastic back
Z3i
-
SIM
S2 FE
Nano-SIM + Nano-SIM
Z3i
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
Z3i
-
Type
S2 FE
AMOLED, 1B colors, 120Hz, HDR10+, 1000 nits, 2000 nits (HBM)
Z3i
IPS LCD
Size
S2 FE
6.83 inches, 112.6 cm2 (~89.8% screen-to-body ratio)
Z3i
6.3 inches, 99.1 cm2 (~84.0% screen-to-body ratio)
Resolution
S2 FE
1260 x 2800 pixels, 20:9 ratio (~450 ppi density)
Z3i
1080 x 2280 pixels, 19:9 ratio (~400 ppi density)
OS
S2 FE
Android 16, OriginOS 6
Z3i
Android 8.1 (Oreo)
Chipset
S2 FE
Mediatek Dimensity 7300e (6 nm)
Z3i
Mediatek MT6771 Helio P60 (12 nm)
CPU
S2 FE
Octa-core (4x2.5 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
Z3i
Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)
GPU
S2 FE
Mali-G610
Z3i
Mali-G72 MP3
Card slot
S2 FE
No
Z3i
microSDXC (dedicated slot)
Internal
S2 FE
128GB 6GB RAM, 128GB 8GB RAM
Z3i
128GB 6GB RAM
Other
S2 FE
UFS 3.1
Z3i
eMMC 5.1
Dual
S2 FE
50 MP, f/1.8, (wide), 1/2.93", PDAF Auxiliary lens
Z3i
16 MP, f/2.0, PDAF Auxiliary lens
Features
S2 FE
LED flash, HDR, panorama
Z3i
LED flash, HDR, panorama
Video
S2 FE
Yes
Z3i
1080p@30fps
Single
S2 FE
32 MP, f/2.0, 22mm (wide)
Z3i
24 MP, f/2.0, 26mm (wide), 1/2.8", 0.9µm
Video
S2 FE
1080p@30fps
Z3i
1080p@30fps
Features
S2 FE
-
Z3i
HDR
Loudspeaker
S2 FE
Yes, with stereo speakers
Z3i
Yes
3.5mm jack
S2 FE
No
Z3i
Yes
WLAN
S2 FE
Yes
Z3i
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Bluetooth
S2 FE
5.4, A2DP, LE
Z3i
4.2, A2DP, EDR, LE, aptX
Positioning
S2 FE
GPS, GALILEO, GLONASS, QZSS, BDS
Z3i
GPS, GLONASS, BDS
NFC
S2 FE
No
Z3i
No
Radio
S2 FE
No
Z3i
FM radio
USB
S2 FE
USB Type-C 2.0, OTG
Z3i
microUSB 2.0, OTG
Sensors
S2 FE
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Z3i
Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Type
S2 FE
Si/C Li-Ion 10000 mAh
Z3i
3315 mAh, non-removable
Charging
S2 FE
44W wired Reverse wired
Z3i
18W wired
Colors
S2 FE
Stellar Green, Zen White, Titan Black
Z3i
Aurora blue, Millenium Pink
SAR
S2 FE
1.14 W/kg (head) 1.00 W/kg (body)
Z3i
-
Price
S2 FE
About 360 EUR
Z3i
About 350 EUR