---
title: "Update App for both windows phone 7.5 and 8"  
description: "Update App for both windows phone 7.5 and 8"  
author: "Samuel Fernandes"  
published: 2015-04-07  
updated: 2015-04-07  
canonical: https://www.mindstick.com/forum/23084/update-app-for-both-windows-phone-7-5-and-8  
category: ".net"  
tags: ["windows phone"]  
reading_time: 2 minutes  

---

# Update App for both windows phone 7.5 and 8

I have an [Windows](https://www.mindstick.com/articles/311752/how-to-install-and-use-the-google-wifi-software-on-a-windows-or-mac-computer) [Phone app](https://www.mindstick.com/forum/23080/windows-phone-app-approval-process) designed to work on WP 7.5. It was uploaded to the store long time ago and now i wanna [update](https://www.mindstick.com/forum/156353/what-is-hummingbird-update) the app. I want to update the app for WP 7.5 and also create the same app for WP8. I'm doing the [updates](https://yourviews.mindstick.com/view/85235/global-efforts-to-combat-climate-change-updates-and-initiatives) to the existing WP7.5 [project](https://www.mindstick.com/articles/105927/how-to-excel-at-managing-multiple-projects) and get the XAP file and then [Upgrade](https://www.mindstick.com/articles/167406/how-to-upgrade-your-freelance-designer-job) the project to WP8 and the do some changes and get another XAP for windows phone 8. But my [question](https://www.mindstick.com/blog/23175/how-to-solve-neet-question-paper-in-less-time) is how can i [upload](https://www.mindstick.com/forum/12860/how-to-upload-file-asynchronously-using-generic-handler) both XAP file to the marketplace. Im not very clear about what should i do. if i do the above [procedure](https://www.mindstick.com/forum/32/stored-procedure-return-datatype), would i be wasting my time. I have another app that i updated for WP8 but not for WP7.5 my nokia Lumia 710 shows the older WP7.5 [version](https://www.mindstick.com/articles/12845/things-to-remember-while-migrating-odoo-to-a-better-version) of the app. I understand the logic behind that but can i update for both of the OS at the same time?

## Replies

### Reply by Anonymous User

I'm not sure what you mean. Basically, you have to upload a separate XAP for WP7 and for WP8. I recommend keeping a copy of your WP7 Visual Studio project before upgrading it, just in case you want to publish a bug fix or something for the WP7 version of your app.\
![Update App for both windows phone 7.5 and 8](https://www.mindstick.com/mindstickforums/85a0da54-ec1d-4691-a25c-853f3d5659ef/images/9895c8b0-aadd-4184-a5b9-114e9c00a54d.png)\
\
In the DevCenter, when submitting an update, all the XAPs available for your application are listed. You can click on "Add new" to add a XAP for a different version of the OS. Use "Replace" to update an old XAP for a specific version of the OS. This way, you can independently update your WP7 and WP8 versions. You can't update both at once (meaning, upload a single XAP and use it for both versions of the OS) since WP7 isn't forward-compatible\
\


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Original Source: https://www.mindstick.com/forum/23084/update-app-for-both-windows-phone-7-5-and-8

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