SOLUTION FOR UPGRADING PROBLEM FOR NOKIA XL......

JUST FOLLOW THE STEPS..

1.FIRST DOWNLOAD THE UPDATE AND TRY TO INSTALL IT.

2.IF IT NOT INSTALLED THEN LEAVE TO RESTART TO ITS SELF.

3.AFTER IT STARTED THE. AGAIN SWITCH IT OFF AND RESTART.. WHILE RESTARTING JUST PRESS THE VOLUME UP BUTTON UNTILL U SEE THE BOOTING SCREEN ON YOUR PHONE..

4. THEM SELECT 

apply update from the external storage option->ANDROID->data-->>com.nokia.update-->>files-->>update..

5.THEN IT TAKES SOME TIME TO INSTALL.. AFTER ALL ITS DONE..

I HOPE IT IS USEFUL SOME HOW...      ADMIN   KRISHNA MOHAN(8374646206)