Updating iphone firmware without itunes
Do I need to install IPSW file with i Tunes or 3rd-party IPSW installer tools?However, for those regular users of i OS devices (including i Phone, i Pad and i Pod), IPSW might be a quite rare thing.For more information on the protocol, see DFU 0x1227. Please explain this for me.” For those people who have restored their i Phone, i Pad or i Pod quite often, IPSW is no stranger.However, as known to all, there is a risk of data loss during i OS device firmware update.Therefore we would like to highly recommend you back up i OS device (i Phone, i Pad and i Pod) before you install IPSW file with or without i Tunes.However, there shouldn’t be any reason to convert an IPSW file to another format.
Once you have connected your i OS device (i Phone, i Pad, and i Pod) to i Tunes and install IPSW file on i Tunes, your i OS device will be updated.
DFU is part of the Secure ROM which is burned into the hardware, so it cannot be removed.
On A7 devices, it generates an Ap Nonce and recognizes APTickets as well, so even in DFU, it can accept an APTicket.
As mentioned above, when you connect an i OS device (i Phone, i Pad or i Pod) to i Tunes and choose to update your i OS device firmware, i Tunes would automatically download IPSW file for your device connected.
Apple always releases new IPSW files through i Tunes, but you could still download current and outdated firmware versions of IPSW file websites like IPSW Downloads.