Screen size
S309Winner: 4.0"+45%
X3122.2"
Quick verdict
S309 leads the measured specs 13-1.
Measured wins
S309
13
spec wins
Overall winner
Ties
2
equal specs
X312
1
spec wins
Screen size
Technology
S309
GSM / HSPA
X312
GSM
2G bands
S309
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
X312
GSM 900 / 1800 / 1900
3G bands
S309
HSDPA 900 / 2100
X312
-
Speed
S309
HSPA 21.1/5.76 Mbps
X312
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
5G support
equal specsNFC
3.5mm jack
SD card
equal specsStereo speakers
-
GPRS
S309
-
X312
Class 12
EDGE
S309
-
X312
No
Announced
S309
2015, July. Released 2015, July
X312
2010, April. Released 2010, April
Status
S309
Discontinued
X312
Discontinued
Dimensions
S309
127.6 x 64.7 x 10.8 mm (5.02 x 2.55 x 0.43 in)
X312
111 x 46.6 x 14.2 mm (4.37 x 1.83 x 0.56 in)
Weight
S309
127 g (4.48 oz)
X312
101 g (3.56 oz)
SIM
S309
Dual SIM (Mini-SIM, dual stand-by)
X312
Mini-SIM
Type
S309
TFT, 256K colors
X312
TFT, 256K colors
Size
S309
4.0 inches, 45.5 cm2 (~55.2% screen-to-body ratio)
X312
2.2 inches, 15.0 cm2 (~29.0% screen-to-body ratio)
Resolution
S309
480 x 800 pixels, 5:3 ratio (~233 ppi density)
X312
240 x 320 pixels, 4:3 ratio (~182 ppi density)
OS
S309
Android 5.1 (Lollipop)
X312
-
CPU
S309
Dual-core 1.0 GHz
X312
-
Card slot
S309
microSDHC (dedicated slot)
X312
microSD (dedicated slot)
Internal
S309
8GB 1GB RAM
X312
5MB
Phonebook
S309
-
X312
1000 entries, Photocall
Call records
S309
-
X312
Yes
Single
S309
5 MP, AF
X312
2 MP
Features
S309
LED flash
X312
-
Video
S309
Yes
X312
176x144@15fps
Single
S309
VGA
X312
-
Video
S309
X312
-
Other
S309
-
X312
No
Loudspeaker
S309
Yes
X312
Yes
3.5mm jack
S309
Yes
X312
No
WLAN
S309
Wi-Fi 802.11 b/g/n, hotspot
X312
No
Bluetooth
S309
4.0, A2DP
X312
2.0, A2DP
Positioning
S309
GPS
X312
No
NFC
S309
No
X312
-
Radio
S309
FM radio
X312
FM radio, RDS
USB
S309
microUSB 2.0
X312
miniUSB 1.1
Sensors
S309
Accelerometer, proximity
X312
Messaging
S309
-
X312
SMS(threaded view), MMS, Email
Browser
S309
-
X312
WAP 2.0/xHTML
Games
S309
-
X312
Yes + downloadable
Java
S309
-
X312
Yes, MIDP 2.0
Other
S309
-
X312
MP3/WAV/AAC+ player MP4/H.263 player Organizer Voice memo Predictive text input
Type
S309
Li-Ion 1600 mAh, removable
X312
Removable Li-Ion 1050 mAh battery
Stand-by
S309
Up to 500 h (3G)
X312
Up to 744 h
Talk time
S309
Up to 9 h 30 min (3G)
X312
Up to 8 h 30 min
Colors
S309
Black, Red
X312
Grey