Screen size
S309Winner: 4.0"+35%
X5282.6"
Quick verdict
S309 leads the measured specs 12-1.
Measured wins
S309
12
spec wins
Overall winner
Ties
3
equal specs
X528
1
spec wins
Screen size
Technology
S309
GSM / HSPA
X528
GSM
2G bands
S309
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
X528
GSM 900 / 1800 / 1900 - SIM 1, GSM 900 / 1800 / 1900 - SIM 2
3G bands
S309
HSDPA 900 / 2100
X528
-
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
X528
-
GPRS
S309
-
X528
Class 12
EDGE
S309
-
X528
Yes
Announced
S309
2015, July. Released 2015, July
X528
2012, March
Status
S309
Discontinued
X528
Discontinued
Dimensions
S309
127.6 x 64.7 x 10.8 mm (5.02 x 2.55 x 0.43 in)
X528
120 x 51 x 18.1 mm (4.72 x 2.01 x 0.71 in)
Weight
S309
127 g (4.48 oz)
X528
180 g (6.35 oz)
SIM
S309
Dual SIM (Mini-SIM, dual stand-by)
X528
Dual SIM (Mini-SIM)
Type
S309
TFT, 256K colors
X528
TFT, 256K colors
Size
S309
4.0 inches, 45.5 cm2 (~55.2% screen-to-body ratio)
X528
2.6 inches, 20.9 cm2 (~34.2% screen-to-body ratio)
Resolution
S309
480 x 800 pixels, 5:3 ratio (~233 ppi density)
X528
240 x 320 pixels, 4:3 ratio (~154 ppi density)
OS
S309
Android 5.1 (Lollipop)
X528
-
CPU
S309
Dual-core 1.0 GHz
X528
-
Card slot
S309
microSDHC (dedicated slot)
X528
microSDHC (dedicated slot)
Internal
S309
8GB 1GB RAM
X528
-
Phonebook
S309
-
X528
Yes
Call records
S309
-
X528
Yes
Single
S309
5 MP, AF
X528
3.15 MP
Features
S309
LED flash
X528
-
Video
S309
Yes
X528
QCIF@15fps
Single
S309
VGA
X528
-
Video
S309
X528
-
Other
S309
-
X528
No
Loudspeaker
S309
Yes
X528
Yes
3.5mm jack
S309
Yes
X528
No
WLAN
S309
Wi-Fi 802.11 b/g/n, hotspot
X528
No
Bluetooth
S309
4.0, A2DP
X528
2.1, A2DP
Positioning
S309
GPS
X528
No
NFC
S309
No
X528
-
Radio
S309
FM radio
X528
FM radio
USB
S309
microUSB 2.0
X528
miniUSB 2.0
Sensors
S309
Accelerometer, proximity
X528
Messaging
S309
-
X528
SMS(threaded view), MMS, Email
Games
S309
-
X528
Yes
Java
S309
-
X528
Yes
Other
S309
-
X528
MP3/AAC+/WAV player MP4/H.263 player Organizer Voice memo Predictive text input
Type
S309
Li-Ion 1600 mAh, removable
X528
Removable Li-Ion 1500 mAh battery
Stand-by
S309
Up to 500 h (3G)
X528
Up to 2400 h
Talk time
S309
Up to 9 h 30 min (3G)
X528
Up to 30 h
Colors
S309
Black, Red
X528
Black