The latest Android version available now is Android 5.1.1. Everyone has a wish to update their phone to the latest android version available. There are two possible methods to upgrade your phone to android 5.1.1 lollipop.
#1. Install OTA Update Provided by the Manufacturer
Due the high competition in mobile phone industry, it is very important for manufacturers to provide regular software updates via OTA (Over the air) to the users because now a days people choose a brand not only by considering the hardware specification, but also the software updates. The easiest way to upgrade your phone to the latest android 5.1.1 lollipop is to wait for the OTA updates to arrive. Google nexus devices gets updates very fast. Most of the major players in the smartphone industry also tries to provide the update as soon as possible. Some delays will be there because they need to test the software to make sure that there are no bugs remaining in the upgrade before rolling it out to everyone. So if you own a nexus phone or a phone by any other manufacturer who provides OTA updates in time, then the best idea is to wait for that update
#2. Root Your Phone and Install Custom ROM
Not everyone have a patience to wait for the OTA updates from their OEMs. For them, the method to get lollipop upgrade is to root their phones and install a custom ROM like cyanogen mod. Rooting is basically the process of unlocking the phone and getting access to the entire system. The procedure to get android lollipop via rooting is as follows.
Unlock the Bootloader
In phones made by some particular manufacturers like Motorola and HTC, the bootloader of the phone needs to be unlocked before rooting. The tutorial for doing this can be found in the websites of those phone companies. Simply follow it and unlock the bootloader first as it is necessary before rooting the phone. If there is no need for unlocking the bootloader, then you can directly skip to the rooting step. Please keep it in mind that you will lose all your data when you unlock the bootloader. So don’t forget to take a backup before you do so.
Root your phone
There are various methods available gain root access. You can either root your phone by using apps like ‘Kinsgroot’ which allows you to get rooted without the help of a computer. If that doesn’t work well, you can then try universal tools like ‘super one click root’. It is a software that can be used in your PC. Not every phone can be rooted by using these software. In that case, you can simply search in Google or in XDA forum to find how to root your phone
Install custom recovery
Go to XDA forums and find a suitable recovery for your phone and flash it. Tutorials will be available in the respective threads.
Flash a custom ROM
This is the last step. A large collection of custom ROM (Customized OS for phone) is available at XDA. Simply surf through it and find one that looks suitable for you. The guide to install those ROMs will be available in the respective threads. Flash it and you finally have lollipop update!