How to Update all lumia phone to windows 8.1

How to Update all lumia phone to windows 8.1 

the windows 8.1 edition is now being available for all lumia series phone like lumia 520 .625,720,etc

with no extra requirements . with the help of a little trick .
Ok so now let us start .
the windows 8.1 update or cortana update is not available for all the users . but it can be updated with the help of a little trick .

Some Features with latest windows 8.1 

• Notification center – Alerts, non-Toast notifications, update history, more
• Quick-access to customized actions, including Wi-Fi, Bluetooth, Plane mode, etc.

• Apps can capture audio/video from themselves; be limited for copyright concerns
• App and Game data stored on SD cards
• Apps on SD Cards are only allowed from ONE originating phone. If it detects that apps from another phone are installed on the SD Card, then it will ask to delete those first
• App Suggestions by location
• Backup of App + Game data to OneDrive (if developer enabled)
• Facebook app comes with OS, updates independently, hooks into OS
• Filter through installed apps by usage/install date
• Manual Update checks
• New Store design and features
• Option to update store apps automatically
• Option to update store apps when only on Wi-Fi
• Single sign-in for apps (like on Windows 8) with Microsoft Account; sign in will persist across devices + apps with permissions prompt

• Background tasks: Bluetooth signal strength, Chat message notification, Device connection change, Device use trigger, Gatt characteristic notification, Location, Push notification, Rfcomm connection, System event, Timer
• XAP replaced by APPX
• ​​Audio/video transcoding that’s hardware accelerated
• New dev tools including: SemanticZoom, DatePicker, TimePicker
• Actionable notifications for apps
• Silent/ghost notifications for apps

Method to update lumia phones 

1.steps , logon to  http://appstudio.windowsphone.com/ . login here with your hotmail/outlook account . after login you becoming the app developer here you can make apps for microsoft appstore  

2.now install , preview for develeper on your windows phone from app store 

3.change you location / time to united states if american time /location 

4.for updates after updating 3 (three times)  updates . you will get the windows go to setting and check 8.1 on your lumia 520 etc .

Give a comment For any issue . on updating 8.1