Screen size
S309Winner: 4.0"+30%
X7122.8"
Quick verdict
S309 leads the measured specs 11-0.
Measured wins
S309
11
spec wins
Overall winner
Ties
5
equal specs
X712
0
spec wins
Screen size
Technology
S309
GSM / HSPA
X712
GSM
2G bands
S309
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
X712
GSM 900 / 1800 / 1900
3G bands
S309
HSDPA 900 / 2100
X712
-
Speed
S309
HSPA 21.1/5.76 Mbps
X712
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
equal specs5G support
equal specsNFC
3.5mm jack
equal specsSD card
equal specsStereo speakers
-
GPRS
S309
-
X712
Class 12
EDGE
S309
-
X712
Yes
Announced
S309
2015, July. Released 2015, July
X712
2010, July. Released 2010, July
Status
S309
Discontinued
X712
Discontinued
Dimensions
S309
127.6 x 64.7 x 10.8 mm (5.02 x 2.55 x 0.43 in)
X712
105.8 x 51.5 x 16.7 mm (4.17 x 2.03 x 0.66 in)
Weight
S309
127 g (4.48 oz)
X712
138 g (4.87 oz)
SIM
S309
Dual SIM (Mini-SIM, dual stand-by)
X712
Dual SIM (Mini-SIM, dual stand-by)
Type
S309
TFT, 256K colors
X712
AMOLED, 56K colors
Size
S309
4.0 inches, 45.5 cm2 (~55.2% screen-to-body ratio)
X712
2.8 inches, 22.3 cm2 (~41.0% screen-to-body ratio)
Resolution
S309
480 x 800 pixels, 5:3 ratio (~233 ppi density)
X712
240 x 400 pixels, 5:3 ratio (~167 ppi density)
Other
S309
-
X712
External display
OS
S309
Android 5.1 (Lollipop)
X712
-
CPU
S309
Dual-core 1.0 GHz
X712
-
Card slot
S309
microSDHC (dedicated slot)
X712
microSDHC (dedicated slot)
Internal
S309
8GB 1GB RAM
X712
30MB
Phonebook
S309
-
X712
Yes, Photocall
Call records
S309
-
X712
Yes
Single
S309
5 MP, AF
X712
5 MP, AF
Features
S309
LED flash
X712
LED flash
Video
S309
Yes
X712
480p@30fps
Single
S309
VGA
X712
-
Video
S309
X712
-
Other
S309
-
X712
No
Loudspeaker
S309
Yes
X712
Yes
3.5mm jack
S309
Yes
X712
Yes
WLAN
S309
Wi-Fi 802.11 b/g/n, hotspot
X712
No
Bluetooth
S309
4.0, A2DP
X712
2.0, A2DP
Positioning
S309
GPS
X712
No
NFC
S309
No
X712
-
Radio
S309
FM radio
X712
Stereo FM radio, RDS
USB
S309
microUSB 2.0
X712
miniUSB 2.0
Sensors
S309
Accelerometer, proximity
X712
Fingerprint (front-mounted)
Messaging
S309
-
X712
SMS, MMS, Email
Browser
S309
-
X712
WAP 2.0/xHTML, HTML
Games
S309
-
X712
Yes
Java
S309
-
X712
Yes, MIDP 2.0
Other
S309
-
X712
MP3/WAV/AAC+ player MP4/H.263 player Organizer Voice memo Predictive text input
Type
S309
Li-Ion 1600 mAh, removable
X712
Removable Li-Ion 1050 mAh battery
Stand-by
S309
Up to 500 h (3G)
X712
Up to 744 h
Talk time
S309
Up to 9 h 30 min (3G)
X712
Up to 8 h
Colors
S309
Black, Red
X712
Black, White, Brown