Procedure to Downgrading Your Phone.
1) Download Phoenix Lastest Software. Here (http://www.mirrorcreator.com/files/0PRCUXRT/)
2) Download Scandinavian FW Files RM-596 version 11.005 (http://www.mirrorcreator.com/files/EGXZJNYZ/RM-596_11.005.zip_links)
3) Take Backup of Your Contacts, Messages, Calender Enteries & Notes. Please Do not take Backup of Setting.
*A] Use Nokia Suite for backup
B] Use in-built Backup option of Phone.
4) After 3rd step Hard-Reset your phone with 3 key method by Holding Menu+Volume Down+Camera key until Nokia Screen Appears or *#7370#. by this All data of Phone Memory & Mass Memory will get deleted.
5) Extract Files of Scanvidia FW or V11.005 to C:\Program Files\Nokia\Phoenix\Products\RM-596
6) Open Phoenix Softwarem then follow steps:
A]File
B]Open Product
(http://i1009.photobucket.com/albums/af213/pranil155/1-12.jpg)
C]RM-596 (Search or It may be the only one)
D]Click OK
E]Now Click "Flashing" [on Top Menu]
F]Click "Firmware Update"
(http://i1009.photobucket.com/albums/af213/pranil155/2-7.jpg)
G]Press "Product Code" click Scandinavian dg
(http://i1009.photobucket.com/albums/af213/pranil155/3-5.jpg)
H]Press OK
I]Check Mark ON of "Dead Phone USB Flashing"
J]Press Option
I]Delete RED Highlighted File. i.e. emmc file [if any present]
(http://i1009.photobucket.com/albums/af213/pranil155/4-4.jpg)
K]Click OK
7) Switch Off your handset.
8] Connect your data cable to your PC/Laptop. but not to your phone.
9) Press "Refurbish" option
10) dialouge box will open. just insert data cable in your phone.
(http://i1009.photobucket.com/albums/af213/pranil155/5-2.jpg)
11) "Slightly" press Power Button of Handset until Phoenix procedure starts. Click OK of dialouge box.
12) till then download other phone FWs or CFWs.
Enjoy Downgrading your phone.
***Note
If You don't want to use buggy phone, always remember
*Never take backup & restoring of SETTING in your phone.
*Do Hard-Reset your phone before Upgrading & Downgrading Phone.