Start the Update
Tap the Settings icon, select General, tap Software Update. If you need the update, here’s where it’ll let you know.
Here we go
After you’ve agreed to the “Terms and Conditions” you’re off and running, starting with a quick download. While you wait, it gives you something to read, showing you what the update will fix.
Over-the-air update means a quick download
It took us about 4 minutes to finish the download over a moderately fast broadband connection and Wi-Fi. It advised us to plug in our device — we didn’t with one iPhone 4S that was fully charged, but we plugged in this additional iPhone 4S that was running low on battery power. It won’t upgrade unless your device is 50% charged.
After the download, this screen appears
The installation takes about 5 minutes
First it appears to be rebooting. Then you see this progress bar. After a final reboot…
You’re good to go.
Longer battery life will surely be welcome. We’ll be testing that.