Screen size
S309Winner: 4.0"+25%
X5253.0"
Quick verdict
S309 leads the measured specs 10-2.
Measured wins
S309
10
spec wins
Overall winner
Ties
4
equal specs
X525
2
spec wins
Screen size
Technology
S309
GSM / HSPA
X525
GSM
2G bands
S309
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
X525
GSM 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
S309
HSDPA 900 / 2100
X525
-
Speed
S309
HSPA 21.1/5.76 Mbps
X525
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
equal specsSD card
equal specsStereo speakers
-
GPRS
S309
-
X525
Class 12
EDGE
S309
-
X525
Yes
Announced
S309
2015, July. Released 2015, July
X525
2011, Q3
Status
S309
Discontinued
X525
Discontinued
Dimensions
S309
127.6 x 64.7 x 10.8 mm (5.02 x 2.55 x 0.43 in)
X525
160 x 51 x 14.4 mm (6.30 x 2.01 x 0.57 in)
Weight
S309
127 g (4.48 oz)
X525
108 g (3.81 oz)
SIM
S309
Dual SIM (Mini-SIM, dual stand-by)
X525
Dual SIM (Mini-SIM, dual stand-by)
Type
S309
TFT, 256K colors
X525
TFT resistive touchscreen, 256K colors
Size
S309
4.0 inches, 45.5 cm2 (~55.2% screen-to-body ratio)
X525
3.0 inches, 25.6 cm2 (~31.4% screen-to-body ratio)
Resolution
S309
480 x 800 pixels, 5:3 ratio (~233 ppi density)
X525
240 x 400 pixels, 5:3 ratio (~155 ppi density)
OS
S309
Android 5.1 (Lollipop)
X525
-
CPU
S309
Dual-core 1.0 GHz
X525
-
Card slot
S309
microSDHC (dedicated slot)
X525
microSDHC (dedicated slot)
Internal
S309
8GB 1GB RAM
X525
44MB
Phonebook
S309
-
X525
Yes, Photocall
Call records
S309
-
X525
Yes
Single
S309
5 MP, AF
X525
3.15 MP
Features
S309
LED flash
X525
LED flash
Video
S309
Yes
X525
QCIF
Single
S309
VGA
X525
-
Video
S309
X525
-
Other
S309
-
X525
No
Loudspeaker
S309
Yes
X525
Yes
3.5mm jack
S309
Yes
X525
Yes
WLAN
S309
Wi-Fi 802.11 b/g/n, hotspot
X525
No
Bluetooth
S309
4.0, A2DP
X525
2.1, A2DP
Positioning
S309
GPS
X525
No
NFC
S309
No
X525
-
Radio
S309
FM radio
X525
Stereo FM radio, RDS
USB
S309
microUSB 2.0
X525
miniUSB 2.0
Sensors
S309
Accelerometer, proximity
X525
Messaging
S309
-
X525
SMS(threaded view), MMS, Email
Games
S309
-
X525
Yes
Java
S309
-
X525
Yes
Other
S309
-
X525
MP3/WAV/WMA/AAC+ player MP4/H.263 player Organizer Voice memo Predictive text input
Type
S309
Li-Ion 1600 mAh, removable
X525
Removable Li-Ion 1530 mAh battery
Stand-by
S309
Up to 500 h (3G)
X525
Up to 1080 h
Talk time
S309
Up to 9 h 30 min (3G)
X525
Up to 14 h
Colors
S309
Black, Red
X525
Silver