Reboot the system. The first boot can take up to 10–15 minutes. Recommended Alternative
Why so aggressive? Android 4.2.2 uses a different filesystem layout (ext4 vs. f2fs) and partition structure. A dirty flash will cause bootloops.
Upgrading a device from Android 4.2.2 (Jelly Bean) to Android 7.0 (Nougat) is upgrade android 4.2 2 to 7.0
Once booted:
of the device you are trying to upgrade? Knowing this will allow for checking if an Android 7.0 custom ROM actually exists for it. Reboot the system
After upgrading to 7.0, you may eventually want or 9.0 Pie . Check XDA Developers forums for “LineageOS 15.1” or “16.0” for your device. Some legacy devices now run Android 11 via unofficial “LegacyOS” builds.
Many devices have unofficial (Android 4.4.4). This is far more stable than Nougat on old chipsets. KitKat supports most apps still (as of 2025, barely). To do this: Android 4
Android 7.0 requires more processing power and RAM than Android 4.2.2. Many older devices simply cannot handle the newer operating system smoothly. Installing Nougat on a device with 512MB or 1GB of RAM might result in a phone that is frustratingly slow.
Now go ahead—breathe new life into that old Jelly Bean device. You have the knowledge. You have the tools. Upgrade Android 4.2.2 to 7.0 today.