Screen size
equal specs50c Oxygen5.0"
50d Helium 4G5.0"
Quick verdict
50c Oxygen and 50d Helium 4G are close on the measured specs.
Measured wins
50c Oxygen
3
spec wins
Ties
11
equal specs
50d Helium 4G
3
spec wins
Screen size
equal specsTechnology
50c Oxygen
GSM / HSPA
50d Helium 4G
GSM / HSPA / LTE
2G bands
50c Oxygen
GSM 850 / 900 / 1800 / 1900
50d Helium 4G
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
50c Oxygen
HSDPA 900 / 2100
50d Helium 4G
HSDPA 900 / 2100
Speed
50c Oxygen
HSPA 21.1/5.76 Mbps
Resolution
Refresh rate
Peak brightness
Pixel density
equal specsCPU speed
RAM
equal specsStorage
equal specsMain 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
50c Oxygen
-
50d Helium 4G
3, 7, 20
Announced
50c Oxygen
2014, February. Released 2014, April
50d Helium 4G
2015, July. Released 2015, July
Status
50c Oxygen
Discontinued
50d Helium 4G
Discontinued
Dimensions
50c Oxygen
145 x 69.8 x 7.6 mm (5.71 x 2.75 x 0.30 in)
50d Helium 4G
146 x 72.2 x 8.4 mm (5.75 x 2.84 x 0.33 in)
Weight
50c Oxygen
140 g (4.94 oz)
50d Helium 4G
154 g (5.43 oz)
SIM
50c Oxygen
Dual SIM
50d Helium 4G
Dual SIM (Micro-SIM, dual stand-by)
Type
50c Oxygen
IPS LCD
50d Helium 4G
IPS LCD
Size
50c Oxygen
5.0 inches, 68.9 cm2 (~68.1% screen-to-body ratio)
50d Helium 4G
5.0 inches, 68.9 cm2 (~65.4% screen-to-body ratio)
Resolution
50c Oxygen
720 x 1280 pixels, 16:9 ratio (~294 ppi density)
50d Helium 4G
720 x 1280 pixels, 16:9 ratio (~294 ppi density)
OS
50c Oxygen
Android 4.2.2 (Jelly Bean)
50d Helium 4G
Android 5.1 (Lollipop)
Chipset
50c Oxygen
Mediatek MT6592 (28 nm)
50d Helium 4G
Qualcomm MSM8916 Snapdragon 410 (28 nm)
CPU
50c Oxygen
Octa-core 1.7 GHz Cortex-A7
50d Helium 4G
Quad-core 1.2 GHz Cortex-A53
GPU
50c Oxygen
Mali-450MP4
50d Helium 4G
Adreno 305
Card slot
50c Oxygen
microSDHC
50d Helium 4G
microSD
Internal
50c Oxygen
8GB 1GB RAM
50d Helium 4G
8GB 1GB RAM
Other
50c Oxygen
-
50d Helium 4G
eMMC 4.5
Single
50c Oxygen
8 MP, AF
50d Helium 4G
13 MP, AF
Features
50c Oxygen
LED flash
50d Helium 4G
LED flash
Video
50c Oxygen
1080p@30fps
50d Helium 4G
1080p@30fps
Single
50c Oxygen
2 MP
50d Helium 4G
5 MP
Video
50c Oxygen
50d Helium 4G
Loudspeaker
50c Oxygen
Yes
50d Helium 4G
Yes
3.5mm jack
50c Oxygen
Yes
50d Helium 4G
Yes
WLAN
50c Oxygen
Wi-Fi 802.11 b/g/n, hotspot, Wi-Fi Direct, DLNA
50d Helium 4G
Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
Bluetooth
50c Oxygen
4.0, A2DP, EDR
50d Helium 4G
4.0, LE
Positioning
50c Oxygen
GPS
50d Helium 4G
GPS
NFC
50c Oxygen
No
50d Helium 4G
No
Radio
50c Oxygen
Stereo FM radio
50d Helium 4G
FM radio
USB
50c Oxygen
microUSB 2.0
50d Helium 4G
microUSB 2.0
Sensors
50c Oxygen
Accelerometer, proximity, compass
50d Helium 4G
Accelerometer, proximity, compass
Type
50c Oxygen
Li-Ion 2000 mAh, removable
50d Helium 4G
Li-Ion 2100 mAh, removable
Colors
50c Oxygen
Black
50d Helium 4G
Dark blue, Black
Price
50c Oxygen
About 240 EUR
50d Helium 4G
About 140 EUR