Screen size
40 Cesium4.0"
50d Helium 4GWinner: 5.0"+20%
Quick verdict
50d Helium 4G leads the measured specs 10-0.
Measured wins
40 Cesium
0
spec wins
Ties
7
equal specs
50d Helium 4G
10
spec wins
Overall winner
Screen size
Technology
40 Cesium
GSM / HSPA
50d Helium 4G
GSM / HSPA / LTE
2G bands
40 Cesium
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
50d Helium 4G
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
40 Cesium
HSDPA 900 / 2100
50d Helium 4G
HSDPA 900 / 2100
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
Battery
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
50d Helium 4G
HSPA 42.2/11.5 Mbps, LTE Cat4 150/50 Mbps
4G bands
40 Cesium
-
50d Helium 4G
3, 7, 20
Announced
40 Cesium
2014, September. Released 2014, September
50d Helium 4G
2015, July. Released 2015, July
Status
40 Cesium
Discontinued
50d Helium 4G
Discontinued
Dimensions
40 Cesium
-
50d Helium 4G
146 x 72.2 x 8.4 mm (5.75 x 2.84 x 0.33 in)
Weight
40 Cesium
50d Helium 4G
154 g (5.43 oz)
SIM
40 Cesium
Dual SIM (dual stand-by)
50d Helium 4G
Dual SIM (Micro-SIM, dual stand-by)
Type
40 Cesium
TFT
50d Helium 4G
IPS LCD
Size
40 Cesium
4.0 inches, 45.5 cm2
50d Helium 4G
5.0 inches, 68.9 cm2 (~65.4% screen-to-body ratio)
Resolution
40 Cesium
480 x 800 pixels, 5:3 ratio (~233 ppi density)
50d Helium 4G
720 x 1280 pixels, 16:9 ratio (~294 ppi density)
OS
40 Cesium
Microsoft Windows Phone 8.1
50d Helium 4G
Android 5.1 (Lollipop)
Chipset
40 Cesium
Qualcomm Snapdragon 200 (28 nm)
50d Helium 4G
Qualcomm MSM8916 Snapdragon 410 (28 nm)
CPU
40 Cesium
Quad-core 1.2 GHz Cortex-A7
50d Helium 4G
Quad-core 1.2 GHz Cortex-A53
GPU
40 Cesium
Adreno 302
50d Helium 4G
Adreno 305
Card slot
40 Cesium
microSDHC
50d Helium 4G
microSD
Internal
40 Cesium
4GB 512MB RAM
50d Helium 4G
8GB 1GB RAM
Other
40 Cesium
eMMC 4.5
50d Helium 4G
eMMC 4.5
Single
40 Cesium
5 MP, AF
50d Helium 4G
13 MP, AF
Features
40 Cesium
LED flash
50d Helium 4G
LED flash
Video
40 Cesium
1080p@30fps
50d Helium 4G
1080p@30fps
Single
40 Cesium
2 MP
50d Helium 4G
5 MP
Video
40 Cesium
50d Helium 4G
Loudspeaker
40 Cesium
Yes
50d Helium 4G
Yes
3.5mm jack
40 Cesium
Yes
50d Helium 4G
Yes
WLAN
40 Cesium
Wi-Fi 802.11 b/g/n, hotspot
50d Helium 4G
Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
Bluetooth
40 Cesium
4.0, A2DP, EDR
50d Helium 4G
4.0, LE
Positioning
40 Cesium
GPS
50d Helium 4G
GPS
NFC
40 Cesium
No
50d Helium 4G
No
Radio
40 Cesium
FM radio, RDS
50d Helium 4G
FM radio
USB
40 Cesium
microUSB 2.0
50d Helium 4G
microUSB 2.0
Sensors
40 Cesium
Accelerometer, proximity, compass
50d Helium 4G
Accelerometer, proximity, compass
Type
40 Cesium
Li-Ion 1700 mAh, removable
50d Helium 4G
Li-Ion 2100 mAh, removable
Colors
40 Cesium
Black; Yellow and Blue (included)
50d Helium 4G
Dark blue, Black
Price
40 Cesium
About 80 EUR
50d Helium 4G
About 140 EUR