Screen size
S309Winner: 4.0"+30%
X5182.8"
Quick verdict
S309 leads the measured specs 12-1.
Measured wins
S309
12
spec wins
Overall winner
Ties
3
equal specs
X518
1
spec wins
Screen size
Technology
S309
GSM / HSPA
X518
GSM
2G bands
S309
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
X518
GSM 900 / 1800 / 1900 - SIM 1, GSM 900 / 1800 / 1900 - SIM 2
3G bands
S309
HSDPA 900 / 2100
X518
-
Speed
S309
HSPA 21.1/5.76 Mbps
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
equal specsNFC
3.5mm jack
SD card
equal specsStereo speakers
X518
-
GPRS
S309
-
X518
Class 12
EDGE
S309
-
X518
No
Announced
S309
2015, July. Released 2015, July
X518
2011, February. Released 2011, March
Status
S309
Discontinued
X518
Discontinued
Dimensions
S309
127.6 x 64.7 x 10.8 mm (5.02 x 2.55 x 0.43 in)
X518
104 x 57 x 14.3 mm (4.09 x 2.24 x 0.56 in)
Weight
S309
127 g (4.48 oz)
X518
108 g (3.81 oz)
SIM
S309
Dual SIM (Mini-SIM, dual stand-by)
X518
Dual SIM (Mini-SIM)
Type
S309
TFT, 256K colors
X518
TFT resistive touchscreen, 256K colors
Size
S309
4.0 inches, 45.5 cm2 (~55.2% screen-to-body ratio)
X518
2.8 inches, 24.3 cm2 (~41.0% screen-to-body ratio)
Resolution
S309
480 x 800 pixels, 5:3 ratio (~233 ppi density)
X518
240 x 320 pixels, 4:3 ratio (~143 ppi density)
Other
S309
-
X518
Handwriting recognition
OS
S309
Android 5.1 (Lollipop)
X518
-
CPU
S309
Dual-core 1.0 GHz
X518
-
Card slot
S309
microSDHC (dedicated slot)
X518
microSDHC (dedicated slot)
Internal
S309
8GB 1GB RAM
X518
1MB
Phonebook
S309
-
X518
Yes, Photocall
Call records
S309
-
X518
Yes
Single
S309
5 MP, AF
X518
2 MP
Features
S309
LED flash
X518
LED flash
Video
S309
Yes
X518
CIF@15fps
Single
S309
VGA
X518
-
Video
S309
X518
-
Other
S309
-
X518
No
Loudspeaker
S309
Yes
X518
Yes
3.5mm jack
S309
Yes
X518
No
WLAN
S309
Wi-Fi 802.11 b/g/n, hotspot
X518
No
Bluetooth
S309
4.0, A2DP
X518
2.0, A2DP
Positioning
S309
GPS
X518
No
NFC
S309
No
X518
-
Radio
S309
FM radio
X518
Stereo FM radio, RDS
USB
S309
microUSB 2.0
X518
miniUSB 2.0
Infrared port
S309
-
X518
Yes
Sensors
S309
Accelerometer, proximity
X518
Messaging
S309
-
X518
SMS, MMS, Email, IM
Browser
S309
-
X518
WAP 2.0/xHTML
Games
S309
-
X518
Yes + downloadable
Java
S309
-
X518
Yes, MIDP 2.0
Other
S309
-
X518
MP3/AAC+/WAV player MP4/H.263 player Organizer Voice memo Predictive text input
Type
S309
Li-Ion 1600 mAh, removable
X518
Removable Li-Ion 1530 mAh battery
Stand-by
S309
Up to 500 h (3G)
X518
Up to 1000 h
Talk time
S309
Up to 9 h 30 min (3G)
X518
Up to 12 h
Colors
S309
Black, Red
X518
Black