install and update windows phone 8 into 8.1

Recently microsoft has been released a official update for windows phone 8 to 8.1. Update your Windows Phone 8 device into Windows Phone 8.1 with the use of 'Preview for Developer' app for windows phones.
Yes you can easily update your Windows Phone 8 devices after enable this app, enjoy windows phone 8.1 latest launched version.

STEPS TO UPDATE INTO WINDOWS PHONE 8.1:

1.Sign up for Microsoft’s App Studio: appstudio.windowsphone.com which is free of cost, using your Microsoft ID which is used on your phone and allow them to register your email address. Once you have the confirmation on the account created, now you need to install an app on your phone. 

2.Install the Preview for Developers app and then sign in with the same ID which you used to create the App studio account in step 1.

3.Now you can see an option “Enable Preview for Developers”, check the option and click done. 

4.That’s it. You are now enrolled to the developers program. Now when the update is released, Go to Settings-> Phone Updates and click check for updates button and you will be able to see the updates,and it automatically download the whole update package.

"Note: Wi-Fi network is must for whole update process"