Nieuwe (originele) firmware installeren iPhone 5S

[Theet]

Ga naar onderstaande voor originele firmware:

http://www.iphonefirmware.com/firmwares-download/

Download iTunes (Windows 64bit) via:

http://www.iphonefirmware.com/?dl_id=1673

[EN]
After downloading the desired firmware, you can shift-click (PC) or option-click (Mac) the Restore or Update buttons in iTunes.
A file dialog will open and let you choose the downloaded ipsw-file.

[NL]
Nadat je de firmware hebt gedownload en iTunes op de PC hebt geïnstalleerd, dien je de Shift (ingedrukt houden) + Restore iPhone te klikken waarna een popup venster verschijnt waarin je de firmware kunt kiezen.

When you download the file with IE (Internet Explorer), it has a zip extension. You need to change that to .ipsw (the right extension is IPSW not ispw !!).
Don’t unzip it, just change the extension (rename the .zip file in .ipsw).

If you don’t want to change the file type to .ipsw, just use different browser such Firefox or Safari from Apple. On a Mac if you read “xxxx.ipsw.zip” delete .zip !