Screen size
S309Winner: 4.0"+20%
X8153.2"
Quick verdict
S309 leads the measured specs 11-0.
Measured wins
S309
11
spec wins
Overall winner
Ties
5
equal specs
X815
0
spec wins
Screen size
Technology
S309
GSM / HSPA
X815
GSM
2G bands
S309
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
X815
GSM 900 / 1800 / 1900 - SIM 1, GSM 900 / 1800 / 1900 - SIM 2
3G bands
S309
HSDPA 900 / 2100
X815
-
Speed
S309
HSPA 21.1/5.76 Mbps
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
X815
-
GPRS
S309
-
X815
Yes
EDGE
S309
-
X815
Yes
Announced
S309
2015, July. Released 2015, July
X815
2011, February. Released 2011, March
Status
S309
Discontinued
X815
Discontinued
Dimensions
S309
127.6 x 64.7 x 10.8 mm (5.02 x 2.55 x 0.43 in)
X815
113.3 x 55.6 x 14.6 mm (4.46 x 2.19 x 0.57 in)
Weight
S309
127 g (4.48 oz)
X815
139 g (4.90 oz)
SIM
S309
Dual SIM (Mini-SIM, dual stand-by)
X815
Dual SIM (Mini-SIM)
Type
S309
TFT, 256K colors
X815
TFT resistive touchscreen, 256K colors
Size
S309
4.0 inches, 45.5 cm2 (~55.2% screen-to-body ratio)
X815
3.2 inches, 29.1 cm2 (~46.3% screen-to-body ratio)
Resolution
S309
480 x 800 pixels, 5:3 ratio (~233 ppi density)
X815
240 x 400 pixels, 5:3 ratio (~146 ppi density)
Other
S309
-
X815
Handwriting recognition
OS
S309
Android 5.1 (Lollipop)
X815
-
CPU
S309
Dual-core 1.0 GHz
X815
-
Card slot
S309
microSDHC (dedicated slot)
X815
microSDHC (dedicated slot)
Internal
S309
8GB 1GB RAM
X815
47MB
Phonebook
S309
-
X815
Yes, Photocall
Call records
S309
-
X815
Yes
Single
S309
5 MP, AF
X815
5 MP, AF
Features
S309
LED flash
X815
LED flash
Video
S309
Yes
X815
480p@15fps
Single
S309
VGA
X815
-
Video
S309
X815
-
Other
S309
-
X815
No
Loudspeaker
S309
Yes
X815
Yes
3.5mm jack
S309
Yes
X815
Yes
WLAN
S309
Wi-Fi 802.11 b/g/n, hotspot
X815
No
Bluetooth
S309
4.0, A2DP
X815
2.0, A2DP, EDR
Positioning
S309
GPS
X815
GPS, A-GPS
NFC
S309
No
X815
-
Radio
S309
FM radio
X815
FM radio
USB
S309
microUSB 2.0
X815
miniUSB 2.0
Sensors
S309
Accelerometer, proximity
X815
Accelerometer
Messaging
S309
-
X815
SMS, MMS, Email, IM
Browser
S309
-
X815
WAP 2.0/xHTML
Games
S309
-
X815
Yes + downloadable
Java
S309
-
X815
Yes, MIDP 2.0
Other
S309
-
X815
MP3/AAC+/WAV player MP4/H.263 player Organizer Voice memo Predictive text input
Type
S309
Li-Ion 1600 mAh, removable
X815
Removable Li-Ion 1530 mAh battery
Stand-by
S309
Up to 500 h (3G)
X815
Up to 720 h
Talk time
S309
Up to 9 h 30 min (3G)
X815
Up to 12 h
Colors
S309
Black, Red
X815
Black
Price
S309
-
X815
About 350 EUR