Apple patched the checkm8 vulnerability starting with the A12 chip. Because the iPhone XR lacks this hardware exploit, you cannot use standard checkm8-based tools to inject a ramdisk. How Ramdisks are Achieved on A12+ Devices

All ramdisk tools and scripts discussed in the broader jailbreak and forensic communities—such as Broque Ramdisk, SSHRD_Script, and Onii Ramdisk—are built upon the Checkm8 exploit. They are, by design, incompatible with any device released after the iPhone X, including the iPhone XR.

: It acts as a temporary operating system loaded entirely into the device's 3GB of RAM. It allows technical users to access the internal filesystem without loading the standard iOS security restrictions. Common Uses :

: Allows for hello-screen bypass, passcode backup, and factory resetting without updating the iOS version. Pros : Frequently updated; stable connection protocols. 2. HFZ Ramdisk

: It can be used to wipe a device's content and settings without updating to the latest iOS version. Key Technical Limitation

What is the of your iPhone XR? (e.g., stuck on Apple logo, locked out, Hello screen) What iOS version is the device running?