If you have any doubt regarding these steps, please do ask me about it in our forum before making an attempt to flash.
You might not know us personally, but we have a team of tech-savvy people ready to help you in our forum.
Open the i Phone management page on i Tunes and then hold downbutton.
Step 5: Holding down the shift button will give you the option to choose the IPSW files you downloaded from the web.
Restoring using DFU mode should be the last resort and you can check this guide on how to put the i Phone in DFU mode in the very first place.Step 3: Now, select the device and the version of i OS you would like to download.Make sure you only download the signed firmware from here as they can only be restored using i Tunes.And, this time, I was going to manually flash the OS to my i Phone. Just in case you want to be extra sure, you can also create an i Cloud backup.Step 2: Make sure your i Phone is at least 70% charged and look at the back of your i Phone for the model number.All your contacts, apps, messages will be restored back.