Having just restored my iPhone 4s which had gone dead today after the iOS 8.3 update yesterday, I guess I have to take back my words from the previous post. I had mentioned that iOS 8.3 does not seem to be any worse than 8.2 and it should be okay to update. You might want to hold off the update since there are quite a few reports on the net which makes iOS 8.3 seem to be one of the buggiest releases ever.
My iPhone 4s went into a reboot & switch off loop while sending an email. The only way to fix it was to restore it using iTunes. A caveat here is that the phone had to be put in recovery mode for it to stop rebooting long enough for iTunes to recognise the device. For those who might have the same issue, just keep the home button on the phone pressed while plugging the USB cable into your system (Mac/PC). You might have to retry this a few times before the phone lands up in recovery mode and stops rebooting & switching off.
Do not attempt to update as that will generally fail. A full restore will work more often than not. I would also not recommend restoring from a backup, after recovery, since that might lead to the same loop all over again.
Think I should mention that iOS 8.3 also drains the battery on all my iPhones pretty fast and while updating with iOS 8.3, the phones heated up quite a bit.
I guess it’s time to carry around a back up phone if you use an iPhone and keep updating to the latest firmware from Apple…Just make sure it takes the same size SIM.
Watch out for the Apple watch…it might tell you the date & time of a different planet 🙂