Typically you would then copy that IPSW file to a USB key or DVD to bring it home to manually update a device.
Also, for users with many of the same i OS devices, having a single IPSW downloads let’s you conserve bandwidth by applying a single update to many devices.
For those who stick with i OS 9, we prepare you this guide to retrieve the lost data on i Phone i Pad after i OS 9/9.3.3/9.3.4/9.3.5 upgrade, covering notes, messages, contact, photos, videos, voice memo, Whats App chat history and more.
No surprisingly, this also will happen in i OS 10 update.
Using IPSW is often considered advanced but it’s actually pretty easy, just follow along with these directions and you’ll be along your way.
You can use IPSW files on Mac or Windows, both require i Tunes to work properly.
Just like the situations above, if you have i Tunes or i Cloud backup, and it contains the data you want to retrieve, you can use Phone Rescue to scan your backup and see if the deleted data is still on device, like the following guides: How to Recover Lost Data from i Tunes Backup And if you didn’t make any backup before upgrading to i OS 9, the only way to retrieve deleted data on i OS 9 is scanning your i Phone i Pad with third-party i OS data recovery tool like Phone Rescue - i OS data recovery.
As one of best data recovery tool for i Phone i Pad, Phone Rescue allows you to quickly recover i OS data without backup.