Unable to Update Message

I happen to have my iPhone 6s+ installed iOS 13 after experiencing the same issue. The solution that worked for me is: backed up iPhone with iTunes and restore iPhone with tunes. In doing so iTunes will download back the latest current iOS software and then restore iPhone. You will then need to restore the backup to your iPhone to gain back your stuff. After that proceed to enroll you iOS device, install beta profile and download install iOS 13 beta. It works for me and I hope it works your you too. One sign that it is working is the preparing update takes extra long than usual.

I happen to have my iPhone 6s+ installed iOS 13 after experiencing the same issue which I posted on this thread. The solution that worked for me is: backed up iPhone with iTunes and restore iPhone with tunes. In doing so iTunes will download back the latest current iOS software and then restore iPhone. You will then need to restore the backup to your iPhone to gain back your stuff. After that proceed to enroll you iOS device, install beta profile and download install iOS 13 beta. It works for me and I hope it works your you too. One sign that it is working is the preparing update takes extra long than usual.

I do have the same issue. Drive me nuts because I dying for dark mode. With an iPhone 6s Plus.

I also have the same issue too installing iOS 13. Really desperately need to download it.

Did this work, vd280?