Screen size
40 Cesium4.0"
50 Helium 4GWinner: 5.0"+20%
Quick verdict
50 Helium 4G leads the measured specs 9-0.
Measured wins
40 Cesium
0
spec wins
Ties
8
equal specs
50 Helium 4G
9
spec wins
Overall winner
Screen size
Technology
40 Cesium
GSM / HSPA
50 Helium 4G
GSM / HSPA / LTE
2G bands
40 Cesium
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
50 Helium 4G
GSM 850 / 900 / 1800 / 1900
3G bands
40 Cesium
HSDPA 900 / 2100
50 Helium 4G
HSDPA 900 / 2100 / 1800
Speed
40 Cesium
HSPA 21.1/5.76 Mbps
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
equal specsRAM
Storage
Main camera
Front camera
equal specsBattery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
50 Helium 4G
HSPA 42.2/11.5 Mbps, LTE Cat4 150/50 Mbps
4G bands
40 Cesium
-
50 Helium 4G
1, 3, 7, 8
Announced
40 Cesium
2014, September. Released 2014, September
50 Helium 4G
2014. Released 2014
Status
40 Cesium
Discontinued
50 Helium 4G
Discontinued
Dimensions
40 Cesium
-
50 Helium 4G
145 x 71.5 x 9 mm (5.71 x 2.81 x 0.35 in)
Weight
40 Cesium
50 Helium 4G
160 g (5.64 oz)
SIM
40 Cesium
Dual SIM (dual stand-by)
50 Helium 4G
Micro-SIM
Type
40 Cesium
TFT
50 Helium 4G
IPS LCD
Size
40 Cesium
4.0 inches, 45.5 cm2
50 Helium 4G
5.0 inches, 68.9 cm2 (~66.5% screen-to-body ratio)
Resolution
40 Cesium
480 x 800 pixels, 5:3 ratio (~233 ppi density)
50 Helium 4G
720 x 1280 pixels, 16:9 ratio (~294 ppi density)
OS
40 Cesium
Microsoft Windows Phone 8.1
50 Helium 4G
Android 4.3 (Jelly Bean)
Chipset
40 Cesium
Qualcomm Snapdragon 200 (28 nm)
50 Helium 4G
Qualcomm MSM8926 Snapdragon 400 (28 nm)
CPU
40 Cesium
Quad-core 1.2 GHz Cortex-A7
50 Helium 4G
Quad-core 1.2 GHz Cortex-A7
GPU
40 Cesium
Adreno 302
50 Helium 4G
Adreno 305
Card slot
40 Cesium
microSDHC
50 Helium 4G
microSDHC (dedicated slot)
Internal
40 Cesium
4GB 512MB RAM
50 Helium 4G
8GB 1GB RAM
Other
40 Cesium
eMMC 4.5
50 Helium 4G
eMMC 4.5
Single
40 Cesium
5 MP, AF
50 Helium 4G
8 MP, AF
Features
40 Cesium
LED flash
50 Helium 4G
LED flash
Video
40 Cesium
1080p@30fps
50 Helium 4G
1080p@30fps
Single
40 Cesium
2 MP
50 Helium 4G
2 MP
Video
40 Cesium
50 Helium 4G
Loudspeaker
40 Cesium
Yes
50 Helium 4G
Yes
3.5mm jack
40 Cesium
Yes
50 Helium 4G
Yes
WLAN
40 Cesium
Wi-Fi 802.11 b/g/n, hotspot
50 Helium 4G
Wi-Fi 802.11 b/g/n, hotspot, Wi-Fi Direct, DLNA
Bluetooth
40 Cesium
4.0, A2DP, EDR
50 Helium 4G
4.0, A2DP, EDR, LE
Positioning
40 Cesium
GPS
50 Helium 4G
GPS, GLONASS
NFC
40 Cesium
No
50 Helium 4G
No
Radio
40 Cesium
FM radio, RDS
50 Helium 4G
FM radio
USB
40 Cesium
microUSB 2.0
50 Helium 4G
microUSB 2.0
Sensors
40 Cesium
Accelerometer, proximity, compass
50 Helium 4G
Accelerometer, proximity, compass
Type
40 Cesium
Li-Ion 1700 mAh, removable
50 Helium 4G
Li-Ion 2000 mAh, removable
Talk time
40 Cesium
-
50 Helium 4G
Up to 10 h (2G) / Up to 8 h (3G)
Colors
40 Cesium
Black; Yellow and Blue (included)
50 Helium 4G
Black
Price
40 Cesium
About 80 EUR
50 Helium 4G
About 280 EUR
SAR EU
40 Cesium
-
50 Helium 4G
0.37 W/kg (head) 0.89 W/kg (body)