Visit IPSW.me or The iPhone Wiki . Step 2: Select your exact model number (e.g., A2849 for iPhone 15 Pro Max). Step 3: Download the signed iOS version (must still be signed by Apple). Step 4: In 3uTools, go to Flash & JB > Pro Flash > Import (or "Local Firmware"). Step 5: Browse to the downloaded .ipsw file. Step 6: Click Flash .
Document version 1.0 – suitable for internal support teams or public knowledge base. Error Unable To Load Restore Ramdisk 3utools