All indications are that Apple will officially release iOS 8 today, possibly at 1PM Eastern time as that’s been the case previously.
Before you upgrade make absolutely sure you’ve done a full backup. Backup to iCloud if you’ve configured it (Settings app > iCloud > Storage & Backup > Back Up Now.) And you might also want to do a full iTunes backup as well (connect to your Mac via USB/Lightning cable, select device in left column, choose Back Up Now from the Summary tab) for further protection.
Hold Off on iCloud Drive Upgrade
Apparently iOS 8 will offer to upgrade your iCloud account to Apple’s new iCloud Drive. YOU PROBABLY DON’T WANT TO DO THAT NOW if you use iCloud to sync your data to desktop Macs as syncing will not work until OS X 10.10 “Yosemite” is available which won’t be for another month or so.
After upgrading leave a comment here with your experience and impressions of iOS 8.
2014-09-17 @ 3pm Update
Apple’s upgrade servers (and probably iPhone activation servers as well) are currently being hammered and may or may not be able to respond when you upgrade. Probably a good idea to wait at least a few hours for the dust to settle. Or a few days.
2014-09-18 @ 9am Update
OK, so I’ve upgraded my iPad 3 (Retina) and learned a few things in the process.
First, this is (understandably) a large update, an almost 2GB download. If you plan to install it over-the-air via Settings on your device be aware that due to the way the install operates you need almost 5GB of free space on the device (about 2GB for the download and probably about the same for the preparing install process.) You get the bulk of that space back when the install is done but if you don’t have that much available it will not allow you to perform an over-the-air update. If you want to go this route remove enough extraneous items (movies, etc.) before you try it. But there is another option.
You don’t need that much free space if you perform the upgrade via iTunes. Connect the device to your computer via a USB cable and when you click the Check for Update button on the device’s Summary tab it should offer to install iOS 8. But do youtself a favor and perform a full backup before applying the update just to be safe.
I’m also seeing recommendations to not install iOS 8 on iPhone 4s devices, the reasoning being that as the lowest supported device performance will probably suffer which could well be the case. I haven’t upgraded my 4s yet but I did upgtrade my iPad 3 which didn’t exactly zip along with iOS 7. So far my experience is that iOS 8 seems a bit better in that respect but your mileage may vary. I would definitely turn OFF animations and such in the Accessibility section of Settings for older devices. It helps performance and saves a bit of time spent on flying icons and zooming windows.
And once again, I’d suggest not enabling iCloud Drive yet if you currently rely on iCloud syncing between your iDevice and a desktop computer. Otherwise you will not be able to sync your contacts, bookbarks, etc. until OS X Yosemite is released in a month or so.
OK, so I’ve upgraded my iPhone 4s and … no problems at all. If anything it feels a bit snappier but I can’t say that for sure. Also FYI: Camera Roll is gone and essentially replaced by Recent Photos.