Achievements button in game center - achievements

I published app with game center achievements to app store. Achievements were working and updating. I made a bug fix in non-game center code class and submitted the updated app version to store. Now, I've noticed when I run the new version updated from the store, the game center no longer shows the app achievements button. With the first version of the app, I had to do a lot of configurations thru iTunes Connect to define my leader board and achievements but with the update nothing changed so I left things alone. Did I miss a step? The updated version is showing the high scores correctly but the achievements are not showing. In fact, when i enter game center directly and look for my app, the Achievements button in game center isn't even present for my app like it was in the first version and above the app title it displays, "No Achievements"
App target is iOS 6 for dev in objective-c with 4.3 backwards compatibility for iPhone. I used the iPhone 6.0 simulator and a iPhone 4 for testing.
I've searched your FAQ and couldn't find anything about updated app submissions, so hope you can help. If I missed something, a link will work but I really need to fix this problem since the app is "live".
Thanks for any help offered.
P.S. The simulator shows my achievements button. :(

Found my answer elsewhere. I did miss a step. Turns out Achievements must be re-selected and enabled for an app each time you upload a version even when you're not changing anything. Thankfully, they have a "select all" option. Looks like I'll be releasing another version just to re-enable my achievements. sigh...

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Facebook Instant "PLAY" button not present

My Facebook Instant app does not have a play button, so it's not possible to launch the app via sharing.
Could someone outline what I need to do to get this button to appear please?
I've set up everything (including an app page) in the dashboard. I'm assuming it has something to do with the "fbapp-config.json" file, but sample app doesn't seem to have the most common use case.
I assume don't need a self-hosted bot just to launch my app?
As discussed elsewhere (as I am unable to comment on Stack Overflow) I clarified that this is the Messenger share from the app details page. This looks like a bug on the Facebook side, as this reproduces for me.
For context, I am an engineer working on the Facebook Instant Games team. We will look into fixing this and update here when it is fixed.

iOS 9.2 breaks app protocol handling

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However, iOS9.2 seems to have broken this. Now what happens is when the links is clicked, I get a prompt to open the native app which disappears after roughly 1 second, not even close to giving the user enough time to access. Shortly afterwards I get prompted to go to the App Store to the app's page.
Any idea why this is happening and what changes in iOS9.2 that is causing this would be helpful.
It seems that with iOS9.2, Apple is making a move towards Universal Links and traditional deeplinking is not supported anymore. While I was not able to find any information published direct on iOS9.2 release notes, following links indicate the same:
https://blog.branch.io/ios-9.2-redirection-update-uri-scheme-and-universal-links
https://www.adjust.com/overview/features/2015/12/11/ios-9-2-deeplinking/

RemoveBackEntry in Prism Universal apps

I am building a Universal App using Prism framework. In my Windows Phone app, I have a scenario that I navigate from Page 1 to Page 2, and from Page 2 to Page 3. On click of the Back button on Page 3, I want to go back to Page 1.
I figured that only way I can do is by removing the previous entry from the back stack. But, unfortunately, the NavigationService provided by Prism doesn't have such a method. There is ClearHistroy, but that is not what I want.
Is there a way?
Appreciate your help.
Naweed
For the moment the current implementation of PRISM has stopped ( there is a team working on a newer version - so let's hope they extend this for Win10 ).
So you need to do this the 'old' way, get hold of the Frame in the app and remove an entry from the BackStack. You could use a PRISM event to notify the page and in the code behind of that page run
if(this.Frame.CanGoBack)
{
this.Frame.BackStack.RemoveAt(0);
}

Windows Phone music player app plays songs from phone library

Im learning windows phone 8 development recently. And started developing music player that plays from phone library. I used MediaLibrary API to get all songs,albums and its working fine now.
What is the problme now is i've assigned MediaPlayer_MediaStateChanged,and MediaPlayer_ActiveSongChanged to mediaplayer object. It triggers when i change the songs that are displayed in longListSelector. That events are not firing when i press next or prev button that i get when I press volume button.
Hope You understood what is the problem.
I tried using backgroundPlayerAgent and got to know that doesn support MediaLibrary.
And I saw this question also. But i saw few apps that are able to listen to those prev/next button events. If you know what am i missing please help?? Is there any other third party libraries available?? I've searched lot in web but i dint get any usefull information. SO posting this question thinking that i might get some information
Go to Settings > Music
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creating pull down menu in windows phone 8

I have this requirement where i have to show a menu when users slide their finger down the screen. Just like viewing notifications in android and iOS.
If not the same thing may be any alternatives that i can use.
I'm new to windows phone development.
Please help.
While it can be done on your own, it's a pain to do well, and Telerik has already done this - check out their Data Bound ListBox control - http://www.telerik.com/products/windows-phone/overview/all-controls/databoundlistbox.aspx