This mode can only help update the iOS system or restore/fix the iOS system—installed apps and user data will not be lost or changed. This is the safest option if you want to preserve photos, contacts, messages, and app data. A popup reminder will appear before starting; click "Yes" to proceed. After flashing finishes, you simply wait for the iDevice to start—no reactivation needed.
Click the Download button next to the desired iOS version.
Does your device have a specific (like 4013 or -1) popping up, or are you just doing a routine update? pro flash 3utools
3uTools is an all-in-one iOS management software designed for Windows and, more recently, macOS, serving as a powerful alternative to Apple's official iTunes. The software provides comprehensive device management including data backup and restore, file management (photos, videos, contacts, music), jailbreak assistance, and most importantly—firmware flashing for iOS devices like iPhone, iPad, and iPod.
Technicians use Pro Flash to "Stress Flash" devices to test if a logic board can handle a full write-cycle without crashing. Safety Tips for Advanced Flashing This mode can only help update the iOS
If the automated process keeps hitting an error (like Error -1 or Error 53), Pro Flash provides the detail needed to see exactly which component is failing.
During advanced flashing, you may encounter specific error codes in the log. Here are the most frequent issues and their solutions: After flashing finishes, you simply wait for the
Click on the tab located in the top menu bar. From the left-hand sidebar menu, select Pro Flash . Step 3: Download or Import Firmware
Unlike the standard "Easy Flash" option that automates the process, the Pro Flash environment forces the device into Device Firmware Update (DFU) mode and requires manual firmware management. This makes it the ultimate rescue mechanism for bricked iPhones, iPads, and iPods.
: Capable of downgrading some older devices (e.g., iPhone 4) using saved SHSH blobs.
Displays a list of available iOS versions compatible with the connected device. It indicates whether Apple is still digitally signing the firmware.