The latest iteration of Apple’s mobile operating system has received a number of complaints from users during the upgrade process. Essentially, iOS 9 suffers from a major glitch mid-way through the update and can cause Apple devices to lock up. Any iPhone or iPad has to be forcibly reset to factory settings and re-attempt the upgrade procedure. Unfortunately, this means all of the user-data will be unrecoverable which is bound to annoy even the most devoted of Apple fans.
One reader told The Register:
“I have just updated my iPad to iOS 9 and found to my horror that once it has ‘successfully’ installed and then gone through the initial setup phase, I cannot progress past the second request to ‘slide to upgrade’ page.”
“The setup order is ‘passcode’ – ‘slide to upgrade’ – ‘select Wi-Fi’ – ‘slide to upgrade’ at which point no further actions are possible.”
I’ve also witnessed first-hand reports from Apple customers who are unable to even begin the update process and greeted with technical errors. Supposedly, the problems occur when updating from iOS 7 to iOS 9. From a PR perspective, this is fairly terrible news for Apple given the record-breaking sales of the iPhone 6S and 6S Plus.
Thank you The Register for providing us with this information.
Here is an option with references that might help. Worked for me http://roleli.blogspot.com/2015/09/solution-to-ios9-slide-to-upgrade-issue.html