Screen size
equal specs50 Oxygen5.0"
50d Helium 4G5.0"
Quick verdict
50 Oxygen leads the measured specs 7-2.
Measured wins
50 Oxygen
7
spec wins
Overall winner
Ties
8
equal specs
50d Helium 4G
2
spec wins
Screen size
equal specsTechnology
50 Oxygen
GSM / HSPA
50d Helium 4G
GSM / HSPA / LTE
2G bands
50 Oxygen
GSM 850 / 900 / 1800 / 1900
50d Helium 4G
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands
50 Oxygen
HSDPA 900 / 2100
50d Helium 4G
HSDPA 900 / 2100
Speed
50 Oxygen
HSPA 42.2/11.5 Mbps
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
equal specsStorage
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
50 Oxygen
-
50d Helium 4G
3, 7, 20
Announced
50 Oxygen
2013. Released 2013
50d Helium 4G
2015, July. Released 2015, July
Status
50 Oxygen
Discontinued
50d Helium 4G
Discontinued
Dimensions
50 Oxygen
143 x 70.5 x 9.9 mm (5.63 x 2.78 x 0.39 in)
50d Helium 4G
146 x 72.2 x 8.4 mm (5.75 x 2.84 x 0.33 in)
Weight
50 Oxygen
130 g (4.59 oz)
50d Helium 4G
154 g (5.43 oz)
SIM
50 Oxygen
Micro-SIM
50d Helium 4G
Dual SIM (Micro-SIM, dual stand-by)
Type
50 Oxygen
IPS LCD
50d Helium 4G
IPS LCD
Size
50 Oxygen
5.0 inches, 68.9 cm2 (~68.4% screen-to-body ratio)
50d Helium 4G
5.0 inches, 68.9 cm2 (~65.4% screen-to-body ratio)
Resolution
50 Oxygen
1080 x 1920 pixels, 16:9 ratio (~441 ppi density)
50d Helium 4G
720 x 1280 pixels, 16:9 ratio (~294 ppi density)
OS
50 Oxygen
Android 4.2.2 (Jelly Bean)
50d Helium 4G
Android 5.1 (Lollipop)
Chipset
50 Oxygen
Mediatek MT6589T (28 nm)
50d Helium 4G
Qualcomm MSM8916 Snapdragon 410 (28 nm)
CPU
50 Oxygen
Quad-core 1.5 GHz Cortex-A7
50d Helium 4G
Quad-core 1.2 GHz Cortex-A53
GPU
50 Oxygen
PowerVR SGX544MP2
50d Helium 4G
Adreno 305
Card slot
50 Oxygen
microSDHC (dedicated slot)
50d Helium 4G
microSD
Internal
50 Oxygen
16GB 1GB RAM
50d Helium 4G
8GB 1GB RAM
Other
50 Oxygen
-
50d Helium 4G
eMMC 4.5
Single
50 Oxygen
13.4 MP, AF
50d Helium 4G
13 MP, AF
Features
50 Oxygen
LED flash
50d Helium 4G
LED flash
Video
50 Oxygen
1080p@30fps
50d Helium 4G
1080p@30fps
Single
50 Oxygen
5.3 MP
50d Helium 4G
5 MP
Features
50 Oxygen
LED flash
50d Helium 4G
-
Video
50 Oxygen
50d Helium 4G
Loudspeaker
50 Oxygen
Yes
50d Helium 4G
Yes
3.5mm jack
50 Oxygen
Yes
50d Helium 4G
Yes
WLAN
50 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
50 Oxygen
4.0, A2DP, EDR
50d Helium 4G
4.0, LE
Positioning
50 Oxygen
GPS
50d Helium 4G
GPS
NFC
50 Oxygen
No
50d Helium 4G
No
Radio
50 Oxygen
Stereo FM radio
50d Helium 4G
FM radio
USB
50 Oxygen
microUSB 2.0 (MHL TV-out), OTG
50d Helium 4G
microUSB 2.0
Sensors
50 Oxygen
Accelerometer, gyro, proximity, compass
50d Helium 4G
Accelerometer, proximity, compass
Type
50 Oxygen
Li-Ion 2300 mAh, removable
50d Helium 4G
Li-Ion 2100 mAh, removable
Colors
50 Oxygen
Black
50d Helium 4G
Dark blue, Black
SAR EU
50 Oxygen
0.22 W/kg (head) 0.56 W/kg (body)
50d Helium 4G
-
Price
50 Oxygen
-
50d Helium 4G
About 140 EUR