The first thing is that your mobile should itself ask
for system update. If not then you can also check it from Settings-> About Phone
-> System Updates
The new #Lollipop setup is 378 MB in size.
First download and install the setup.
After installation, Lollipop optimizing all the apps,
upgrading contact database according to new updates.
One thing to remember here is that you cannot make any call
for next 15 min during this installation process or better word is you cannot
do anything with your cell during installation for next 15 min.
Don't worry about installation of new OS. It will keep
your all the apps and settings as it is.
After installation, I suggest just restart your mobile.
I notice lots of improvements in terms of UI,
animation, phone contact screen, settings, performance etc.
So oo ahead and do the installation and become the part
of new android world.
Please leave your comments or share this tip if it’s
useful for you.