Ios 9 cant enable mobile data for application(s)?

I have same exact problem, just downloaded 9.0.1 and YEP IT IS NOT FIXED!!! Grrrrrr.

EVERYONE PLEASE LISTEN!. You do not have to downgrade. I didn't. I simply restored my phone from the back of me just before upgrading to iOS 9. That's it. Problem solved. No downgrade necessatry.

What if you did not back up before upgrading?

yes, I'm one of the WHAT IFs.

now i need to wait for iOS 9.02

bucket me!!

Update:

iOS 9.0.1 is out as of today Sept 23, 2015 and many of us were hoping that it would include a fix for the per-app cellular data toggle switch bug we are all experiencing.

Obviously it hasn't. I spoke with an Apple advisor today who confirmed my guess that this update (9.0.1) was too far in development to go back and change it to fix the per-app cellular data toggle switch bug.

So, like @Leo JIA mentioned above, we'll have to wait for iOS 9.0.2. I wasn't given an ETA for when that might be, but the rep thought probably "this month". So that means about 7 days - but it could be longer.

We'll have to keep waiting. But it seems Apple's aware of the issue and working on a fix.

I still have the same issue the new update (9.01) did not fix the issue.

I'm having the same issue and theres also an issue with the settings app when you open it, it pushes the Airplane Mode with the on/off switch up where you can't see it and Apple released a 9.0.1 update today but that update still didn't fix the 2 issues so it still has bugs in it so don't update to 9.0.1 cuz that still not gonna fix the 2 issues.

What worked for me is to erase the phone and restore the phone using a previous backup anytime before 9.0. When you restore it, the phone will still have the latest update (you don't have to downgrade) but the cellular part will be working and on----- if (I believe) you had them turned on in that backup.

What happened was before the update I was traveling and turned most of the app's cellular data off. Then, I updated the phone when I had hotel wifi and those settings for app cellular got 'stuck'. So, whenever I turned it on and once I exit the menu, it will automatically turn off again. very annoying.

Nothing I tried helps. Only way is to go back to a previous backup that possibly had all of them turned on-- which fortunately, my previous backup did. I think if you have some apps turned off, you would be experiencing similar difficulties.

Just today I noticed this as well. I upgraded last week, and like you, didn't notice any real issues. I turned off a number of apps from using Cellular data as well recently, then today needed to access the iBook store and my phone said I couldn't access the store. I checked my settings and flipped the switch on ibooks as well as a few others I had turned off. I closed Settings and still couldn't access the iBook store. I opened up settings and everything was switched back to off. I came here looking to see if this was unique to me or something others have experienced. I can see I'm not alone.

same issue for me. I turned mobile off for most apps while abroad. now back home and cannot get most apps (9 out of 10) to enable for mobile

again

I restored from an older backup (no need to downgrade below OS 9) and all is right with the world again. Everything works.

I'ts unbelieveble!!! I upgraded iOS 9.0.1 but it's the same. What's going on Apple!!!

seems like Lay Off Season should come soon in Apple.

I Have the same exact problem. Today i updated IOS 9.0.1 and the problem isn't fixed yet. Hope this gets fixed ASAP! My phone is useless without wifi 😟

I also installed IOS 9.0.1 but the disabled apps are still disabled. Disappointing. I cant use my UBER app anymore!