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Seems like I missed a lot when on Vacation because SMS Backup Tool for Windows Phone came out sometimes back and it works on couple of Windows Phone which is unlocked and possibly Interop Unlock. Check the list of Phones over which it is working and why not on others but as it gets working, we will keep you posted.

Features of SMS Backup
- Backup and Export to either Windows Phone Isolated storage mode or upload it to Skydrive.
- When exported to SkyDrive, it will create a folder named as SMS and upload files with unique name as of now date is being used but you can give your own name.
- Allows you to take backup of SMS in Threaded or Date format.
- You can choose between XML or TXT format.
- Supports CSV Format also.
- Restore SMS : Now it is possible to restore your SMS when you switch phone or deleted SMS or switching to a new rom. See how to with a video.
- Supports English and Chinese.
- Export Facebook Chat and MSN Friends Message.
- Download from here
How the Tool Works ?
App Working
Once you install the app, launch it and it will display all your SMS . You can browse the SMS using navigation tool there. To backup, click on Menu bar and select Backup and Export. You can backup either in isolated storage or Skydrive ( Highly Recommended ) and use the text format as it is more readable. XML format will be more usable only when restore option comes in.
Dont Want to use SkyDrive ? Use isolated Storage Tool
For users who do not want to use Skydrive as an option, I will suggest you to use this Windows Phone Manager Tool. Using this tool is simple, Install this tool and launch Zune and select Extract SMS from Device and you will get option to export individual SMS, Conversation or all in XML or Text Format.
Background
A bit of history if you are interested so you understand why it does not work on your phone. Basically all the SMS on Windows Phone are backedup internally over a XML files known as CommsBackup.xml which is stored in isolated storage of Windows Phone. This tool basically copies that XML and extracts SMS from it and then exports. So now any Windows Phone which does not allow to work with that will restrict this app to extract SMS.

List of Windows Phone for which it is Working / Not Working
- Samsung Focus 1st generation : Works and I have the demo done using that.
- Samsung / LG / HTC Gen 1
- HTC generation two i.e. Titant and Radar, Dell, Nokia, and Toshiba/Fujitsu have issues with Interop Unlock.
Screenshot :
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I’ve been wanting to try out windows phone for a while, but SMS Backup has been a sticking point for me… is the Samsung SGH i917 Focus a gen1 phone (i.e. would it be compatible with this?) I’m thinking of picking up one on eBay so I can finally give Windows Phone a try.
Hey Spencer, yes it works with Samsung SGH i917 Focus but you need to unlock your windows phone
Hi Ashish,
Thanks for a great post! I was desperately looking for something to backup my messages from my Nokia Lumia 800. The question I have though is, how do I install the SMS Backup app on my phone? I see the link you have provided has a .zip version, but that is just showing the files in my phone and there is no installable. I read some of the other forums and saw someone changed the extension to .xap and it worked for them. Unfortunately, it didn’t work for me :(
Can you please tell me how to install this app on my phone?
Thanks again for a great post!
Pratap & Rashmi : Do you both have your phone unlocked ?
How i install SMS Backup ?
I am using Lumia710.
No It does not work on Lumia 710
Does this work on Lumia 800?
No It does not work on Lumia 800.
Seems like in Windows Phone 8, We have the option for backing up SMS to Cloud. I hope it comes in some form to Windows Phone 7.5 users.
hi
i have my messages into skydrive
now i upgrade my windows phone
and i need to restore theme
but there is no option to restore theme from skydrive
i only have them in skydrive not in isolated Storage
help
tnx
Hi!
I am not sure if I have to install the app on my computer and somehow drag it on my phone or is it an app to directly install on my phone? I have a HTC Trophy Windows 7 phone. When I download it on my computer I am not able to do anything. And if I search for an app named like this on my mobile phone, I am not able to find anything….
m not able to find any download link nor its there in the marketplace. Even in the features section above Download here theres no option to download the software. Help.
sorry i got the link..
from where to download
Does this work on HTC MOZART ?
Hi Ashish, does this app works on devices dev unlocked after the tango update?
Thanks!
does work on Lumia 610 WP 7.8?
thank you
Does it work with NOKIA Lumia 920?
Thank you!
Hi Does this sms backup work on HTC HD7?