Oppo R15x vs Samsung Galaxy J2 vs Samsung Galaxy J1 4G comparison

Compare Oppo R15x
Compare Samsung Galaxy J2
Compare Samsung Galaxy J1 4G
key specs
Display6.40-inch4.70-inch4.30-inch-
Processorocta-core1.3GHz quad-core1.2GHz quad-core-
Front Camera25-megapixel2-megapixel 2-megapixel-
RAM6GB1GB768MB-
OSAndroid OreoAndroid 5.1Android 4.4-
Storage128GB8GB4GB-
Rear Camera16-megapixel + 2-megapixel5-megapixel 5-megapixel-
Battery Capacity3500mAh2000mAh1850mAh-
Resolution-540x960 pixels480x800 pixels-
general
Release dateNovember 2018September 2015February 2015-
Battery capacity (mAh)350020001850-
ColoursNebula, Ice BlueBlack, White, GoldBlack, Blue, White-
Launched in India-Yes--
Form factor-TouchscreenTouchscreen-
Dimensions (mm)-136.50 x 69.00 x 8.40129.00 x 68.20 x 8.90-
Removable battery-YesYes-
Weight (g)--122.00-
display
Screen size (inches)6.404.704.30-
TouchscreenYesYesYes-
Resolution-540x960 pixels480x800 pixels-
Aspect ratio-16:9--
Pixels per inch (PPI)-234--
hardware
Processorocta-core1.3GHz quad-core1.2GHz quad-core-
Processor makeQualcomm Snapdragon 660Exynos 3475--
RAM6GB1GB768MB-
Internal storage128GB8GB4GB-
Expandable storage-YesYes-
Expandable storage type-microSDmicroSD-
Expandable storage up to (GB)-128128-
camera
Rear camera16-megapixel + 2-megapixel5-megapixel (f/2.2)5-megapixel-
Front camera25-megapixel2-megapixel (f/2.2)2-megapixel-
Rear autofocus-Yes--
Rear flash-LEDLED-
software
Operating systemAndroid OreoAndroid 5.1Android 4.4-
SkinColorOS 5.2---
connectivity
Wi-FiYesYesYes-
GPSYesYesYes-
BluetoothYesYes, v 4.10Yes, v 4.00-
Headphones3.5mm3.5mm3.5mm-
Wi-Fi standards supported-802.11 b/g/n802.11 b/g/n-
NFC-NoYes-
Infrared-NoNo-
USB OTG-YesNo-
FM-YesYes-
Number of SIMs-22-
sim 1
SIM Type-Micro-SIMMicro-SIM-
GSM/CDMA-GSMGSM-
3G-YesYes-
4G/ LTE-YesYes-
sim 2
SIM Type-Micro-SIMMicro-SIM-
GSM/CDMA-GSMGSM-
3G-NoNo-
4G/ LTE-NoNo-
sensors
Compass/ Magnetometer-NoNo-
Proximity sensor-YesYes-
Accelerometer-YesYes-
Ambient light sensor-NoNo-
Gyroscope-NoYes-
Barometer-NoNo-
Temperature sensor-NoNo-