Screen size
A31 (2015)4.5"
F35Winner: 6.6"+32%
Quick verdict
F35 leads the measured specs 16-3.
Measured wins
A31 (2015)
3
spec wins
Ties
3
equal specs
F35
16
spec wins
Overall winner
Screen size
Technology
A31 (2015)
GSM / LTE
F35
GSM / HSPA / LTE / 5G
2G bands
A31 (2015)
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
F35
GSM 850 / 900 / 1800 / 1900
3G bands
A31 (2015)
TD-SCDMA
F35
HSDPA 900 / 2100
4G bands
A31 (2015)
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
USB
equal specs5G support
NFC
equal specs3.5mm jack
SD card
equal specsStereo speakers
F35
1, 3, 5, 8, 19, 28, 38, 40, 41, 42, 48
Speed
A31 (2015)
TD-SCDMA, LTE Cat4 150/50 Mbps
F35
HSPA, LTE, 5G
GPRS
A31 (2015)
Yes
F35
-
EDGE
A31 (2015)
Yes
F35
-
5G bands
A31 (2015)
-
F35
1, 3, 5, 8, 28, 38, 40, 41, 48, 77, 78 SA/NSA
Announced
A31 (2015)
2015, April. Released 2015, April 17
F35
2026, October 05
Status
A31 (2015)
Discontinued
F35
Available. Released 2026, October 11
Dimensions
A31 (2015)
131.9 x 65.5 x 8 mm (5.19 x 2.58 x 0.31 in)
F35
159.1 x 75.8 x 8.8 mm (6.26 x 2.98 x 0.35 in)
Weight
A31 (2015)
135 g (4.76 oz)
F35
205 g (7.23 oz)
SIM
A31 (2015)
Nano-SIM + Micro-SIM
F35
Nano-SIM + Nano-SIM
Build
A31 (2015)
-
F35
Glass front, plastic frame, plastic back
Other
A31 (2015)
-
F35
IP68/IP69K 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
Type
A31 (2015)
IPS LCD
F35
AMOLED, 1B colors, 120Hz, 800 nits (typ), 1400 nits (peak)
Size
A31 (2015)
4.5 inches, 55.8 cm2 (~64.6% screen-to-body ratio)
F35
6.57 inches, 105.0 cm2 (~87.1% screen-to-body ratio)
Resolution
A31 (2015)
480 x 854 pixels, 16:9 ratio (~218 ppi density)
F35
1080 x 2372 pixels (~397 ppi density)
Protection
A31 (2015)
-
F35
Crystal Guard
OS
A31 (2015)
Android 4.4 (KitKat)
F35
Android 16, ColorOS 16
Chipset
A31 (2015)
Qualcomm MSM8916 Snapdragon 410 (28 nm)
F35
Mediatek Dimensity 6360 Max (6 nm)
CPU
A31 (2015)
Quad-core 1.2 GHz Cortex-A53
F35
Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU
A31 (2015)
Adreno 306
F35
Mali-G57 MC2
Card slot
A31 (2015)
microSDXC (dedicated slot)
F35
microSDXC
Internal
A31 (2015)
8GB 1GB RAM
F35
128GB 6GB RAM, 128GB 8GB RAM
Other
A31 (2015)
eMMC 4.5
F35
UFS 2.2
Single
A31 (2015)
8 MP, AF
F35
-
Features
A31 (2015)
LED flash
F35
LED flash, HDR, panorama
Video
A31 (2015)
1080p@30fps
F35
1440p@30fps, 1080p@30/60fps, gyro-EIS
Dual
A31 (2015)
-
F35
50 MP, f/1.9, (wide), 1/2.0", PDAF Auxiliary lens
Single
A31 (2015)
5 MP
F35
50 MP, f/2.1, 18mm (ultrawide), AF
Video
A31 (2015)
F35
1440p@30fps, 1080p@30fps
Features
A31 (2015)
-
F35
Panorama
Loudspeaker
A31 (2015)
Yes
F35
Yes
3.5mm jack
A31 (2015)
Yes
F35
No
WLAN
A31 (2015)
Wi-Fi 802.11 b/g/n
F35
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Bluetooth
A31 (2015)
4.0, A2DP
F35
5.4, A2DP, LE, aptX HD
Positioning
A31 (2015)
GPS
F35
GPS, GALILEO, GLONASS, BDS, QZSS
NFC
A31 (2015)
No
F35
No
Radio
A31 (2015)
No
F35
No
USB
A31 (2015)
microUSB 2.0
F35
USB Type-C 2.0, OTG
Sensors
A31 (2015)
Accelerometer, proximity
F35
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
Type
A31 (2015)
Li-Ion 2000 mAh, non-removable
F35
8000 mAh
Stand-by
A31 (2015)
Up to 240 h
F35
-
Talk time
A31 (2015)
Up to 7 h
F35
-
Charging
A31 (2015)
-
F35
80W wired, 44/80W UFCS, 55W PPS, 13.5W PD, 40% in 30 min Reverse wired
Colors
A31 (2015)
White, Blue
F35
Mist Pink, Titanium Grey, Wave Blue
Price
A31 (2015)
About 150 EUR
F35
About 360 EUR
Models
A31 (2015)
-
F35
CPH2931
SAR
A31 (2015)
-
F35
1.16 W/kg (head) 1.00 W/kg (body)