Aug 16, 2017 I tried to update to iOS 11 but it made my iPhone stuck in recovery mode. I found 3utools to fix recovery mode stuck by restoring system to ios 10.3.3, failed. Again and again failed. Two hackers have created a tool that they claim can bypass Apple’s ‘Activation Lock.’ It’s called ‘doulCi, and it uses a man-in-the-middle attack to intercept users’ Apple ID credentials as well as unlock devices disabled by the highly-lauded security feature. Then guide you step by step. Backup without iTunes & iCloud. Connect Device-Tab'Backup & Ratore'from the top menu. Select Files. By default, all the file types will be ticked.
Nov 26, 2017 Iphone 7 no board damages came in due to not able to update. Customer was updating device and now its stuck in restore mode. Tried to kick it out of restore, it goes to Apple logo for about 6,7 seconds and goes black. Tried to do both restore, and DFU flash in 3utools with retaining data, result 80% complete error-1.
Problem Description: Have you ever met with the problem that when you upgrade or restore iPhone/ iPad/ iPad Touch using iTunes, the recovery process stops and iTunes gives you a warning message that “This iPhone could not be restored. An unknown error occurred (2)”. Why this error occurred? Apple or other third party security software may prevent the communication between Apple applications and Apple server or the sources on PC. Solution: This kind of problem actually can be solved by updating security software, uninstalling security software, or correcting the configuration of security software. A.Check the third party security apps Please verify the following items when this unknown error occurred. * The Settings of your computer’s date, time and time zone. * You have already logged in as the administrator identity. * If your PC or router has proxy settings , please try not to use this internet agency. * Launch the built-in program in iTunes, check the connection and generate the report. B.Update security apps Security software company provides update list to their trusted sites and application regularly. If you update or install a newer version of Apple software recently, such as iTunes or Safari, you may solve the issue by updating the security software. C.Correct configuration iTunes can communicate with Apple serve after you update security software. And the security information must be configured correctly, so please contact related site to get support. D. Temporarily stop or uninstall security apps If your current security software is not compatible with iTunes, you may stop using it and check it. Please make sure that you already known the necessary verification of this security software before you uninstall it. In order to reduce the security risks of this security software, please ensure that all files required are available and remember to disconnect it from the network before uninstalling security software.
Many users were met various error codes when they flashing their iDevice in iTunes or 3uTools, here 3uTools summarizes some common error codes for you (some with solutions) so that users could know why the error arises and how to solve the error effectively.
Warmly Remind: Click 'Ctrl' + 'F' simultaneously, which can help you find the error code faster.
Error-1
Baseband CPU/chip/baseband output of power supply is abnormal.
(With the latest 3uTools, here is the guide for you)
Error 1
Baseband CPU problem or baseband power is not working. Here is the guide for you.
Error 2
Baseband, does not exclude power supply problem.
Error -2
You are suggested to enter DFU mode manually and try to flash again. If fail, it could be a hardware problem on your device.
Error 3
a. Baseband error when your flashing process is over 60%,
b. Chip's problem when your flashing process at 99%.
Here is the guide for you.
Error 6
Hard disk/ Chip problem when flashing process is over 60%.
Error 9
How to factory reset little snitch rules. Hard disk, check power supply for it, rebooting your Mac or PC may resolve this issue.
Here is the guide for you.
Error 10
Server certification issues. Here is the guide for you.
Error 11
Firmware package is not full. Here is the guide for you.
Error 12
Firmware was closed signing. Here is the guide for you.
Error 14
Hard disk, check the resistance between hard disk and CPU. Here is the guide for you.
Error 15
Baseband, not excludes power supply problem.
Error 16
Baseband/CPU/Chip, mostly is chip problem. Here is the guide for you.
Error 17
Here is the guide for you.
Error 20
Enter DFU mode and flash again. Here is the guide for you.
Error 21 CPU/ Battery problem. Here is the guide for you.
Error 23
In software you have to set a default web browser;
In hardware, it's a communication problem. Check all connections, also try to change the battery;
Faulty baseband flash or processor;
Happens frequently after water damage. Remove and clean motherboard;
Here is the guide for you.
Error 26
Baseband/CPU/Chip. Here is the guide for you.
Error 27
Chip data does not match, please use the chip instrument to fix the chip.
Error 28
CPU or hard disk. Here is the guide for you.
Error 29
Battery problem or network problem. Here is the guide for you.