Q: IOS 9 Cellular Data Usage Restrictions not working

I am experiencing the same issue.

iPhone 6 Plus, Verizon, Model MGCK2LL/A, iOS version 9.0 (13A344)

I am having the same problem. Any apps that had cellular data turned off before the update, won't connect to cellular data now. I go to settings and click the toggle "on" for cellular data for that app, but when I click on the app it says no connection. Then I go back to settings and the toggle is turned off.

Diagnostics are turned on.

I Have a iPhone 6 Plus and my model is MGCT2LL/A

i had a back up from 9/19 which had iOS 9...did a full clean reset and then did an iCloud restore of the is...looked like it worked! just had to restore from iCloud

HI am having the same issue with my iPhone 5s , I upgraded to iOS 9 and it worked fine until today , I  was unable to access any  apps using cellular data. Those that were turned on remained on, apps that were turned off cannot be turned on. I am gonna file a feedback form on this issue to raise awareness on this glitch as  realize many of us are experiencing the same problem. I hope it is resolved quickly.

Wanted to give you an update after today's activities. I was finally assigned a Senior Advisor who is actually calling ME now. He had confirmed earlier this morning that word had finally gotten around at Apple about our "bug".  As you've already heard, they are working on an update, which he said would probably be out very soon.  We have another call scheduled for Wednesday morning and I'll post updates (if there are any).

Thanks dglis30731 for the update. Kindly keep us informed about progress.

I'm experiencing the same. The apps affected are both 1st party Apple apps and also 3rd party apps. I'm on an iPhone 6, model MGCQ2LL/A. I've had this issue with my phone since immediately after the update. I'm also having the same problem with my iPad Mini 3, model MH3N2Ll/A. The issue did not affect the iPad until several days after I updated. Both of my devices are now basically useless. Let's hope the fix comes soon.

No matter which of the workarounds I try, every time I toggle cellular data to be on per app and then exit the cellular data settings screen. When I go back into the cellular data menu, the toggle gets set back to off....

Had the same problem. Apps that I turned data off before the update to iOS 9 refused to turn back on after. After about 6 hours of searching google the most believable reason I found is that during the update process a file was corrupted and I was pretty much screwed. The only fix I found was to reset all settings and delete all content from my device and during the set up chose set up as a new device. The stupid file that's broken saves broken to your back up so if you try to restore from a backup you restore the broken file too. Good thing is signing back into iCloud put all my contacts back and 2 gigs of data later I had reinstalled all my apps. Down side is all my apps think it's a new device so I lost all my progress on some of my games.

Noticed the same problem when I was away from home wifi this morning. Reset and restore is the last resort that i would take. hopefully the update can be out as soon as possible.

I have this problem on my iPhone 6 model MG4F2LL/A with iOS 9.

Same exact problem!

Good Morning! As promised, here's an update on my cases. They moved me to IOS Senior Advisor who didn't have any new solutions. But, I sent her a link to this discussion. Not sure if that helps or not, but nothing else has worked so why not.

Hello, i tried today the itunes software reset , it worked.... but After a reboot, the Problem is back .... So After a fresh Installation of iOS 9 and a reboot, the file is corrupt again? apple fix this fast new developed iOS .... Thank you...

Same exact issue as everyone else. I don't see how I can fix this issue-- tried many different workarounds and none seem to turn on data for apps that has been switched off before the 9.0 update.

I am going to try to go back to the previous version. This issue really debilitates because it really renders my phone useless I have wifi. For anyone that travels, this is a huge problem.

Another issue I have is with Gmail. I don't know which update it is probably the 8.XX updates. I can't receive mail messages from the Mail app.  It just won't update at all! The issue still persists after re-adding the account, re-booting the phone.