The list may include distributions that come preinstalled on a device (stock ROM) or modifications of them. Low storage space in your device hampers the smooth operation as well as prevents downloading or updating latest software. Some ROM backup apps create the backup in your SD card or internal memory itself. So, it is wise to leave enough free space to accommodate the device’s various activities.

• Lollipop has a lot of features, and Performance Improvement compares with the KitKat version.
• Such users, therefore, flash third-party custom ROMs to experience the latest Android version.
• In terms of rock-solid stability, LineageOS would take the crown for the most stable custom ROM.

You flash Stock ROM your Samsung device using two methods, one with using Odin flash tool (official method) and second with using TWRP Recovery. If you have already have rooted your Samsung Galaxy J2 Core using the TWRP method then you can go with the second method. I have shown you the easiest way to Flash Stock Firmware on Samsung Galaxy J2 Core.

This new One UI 5.1 update would bring many remarkable features for the end users. Download Samsung Galaxy S6 SM-G920F MT6572 official stock firmware from the link here, and follow the provided flashing instructions to learn how to flash the stock rom.

LINK In this article that will be explained why it is needed, how to check the upgrade as well as how to download and install it. This depends on how many files you got in step 4 above upon extracting the firmware .zip file. Connectivity options include Wi-Fi, GPS, Bluetooth, USB OTG, FM, 3G and firmware download site 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include Proximity sensor, Accelerometer, Ambient light sensor and Gyroscope. You may upgrade or downgrade the Android firmware with flashing.