Jailbreaking or installing unauthorized software can void your Apple warranty.
To download the Cydia IPA file in extra quality, follow these steps: Download Cydia Ipa File Extra Quality
: This is a legitimate tool created by Saurik (the creator of Cydia) used for sideloading other IPAs onto a device, not for installing Cydia itself. You can find it at its official site . Download Cydia Ipa File Extra Quality
While you can't just "download" Cydia as a functional app, there are legitimate ways these technologies overlap: Cydia Impactor Download Cydia Ipa File Extra Quality