When you buy a new Android phone, you’re likely to get one with either Android 4.0 or 4.1 Jelly Bean pre-installed. If you’re not familiar with these versions of the mobile operating system, it’s time to learn about them. Android 4.0 is the most recent version and is used on most modern smartphones and tablets. It offers a more user-friendly interface and is considered more stable than 4.1 Jelly Bean, which is used on some newer Android devices and some older ones. If you want to use an older Android phone with an Android 4.0 or 4.1 pre-installed OS, there are a few ways to do so: You can buy an old Android phone that has been upgraded to 4.0 or 4.1 Jelly Bean, or you can find an old model that has been certified by Google as being compatible with these OSes and has been updated to at least Lollipop (4.3). You can also downgrade your current smartphone’s firmware to 3rd party firmware that supports both versions of the mobile operating system (such as CyanogenMod) or even 2nd party firmware that does not support either version of the mobile operating system (such as T-Mobile’s “LTE” firmware). Finally, if all else fails, you can try flashing your device’s firmware using a third-party software such as Odin (www. Odin3d .com)
