Did you encounter any error codes in 3uTools when you flashing an iOS firmware?
Mar 13, 2019 So if you have met one of the errors at below, you could fix the problem from the general tips. Or if you failed after multiple tries, you can appoint with Apple Service to check the hardware problem. Common Errors: 1. Error: Please connect the device. Error: Unable to read ECID.
Here is the solution about how to fix 'Error: Unable to read ECID(Normal)', as below:
Why did this error happen?
A Broken cable
Unstable USB port
Abnormal driver
Partly hardware problem
How to solve the problem?
Change an original cable and try again
Use a rear USB port on your PC
Fix iTunes driver problem in 3uTools
Restore in iTunes
Ask Apple support if the device still in the warranty. (Connect with 3uTools, check the warranty on the 'iDevice' page)
Check the hardware problem in the local authoritative repair store
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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
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.
3utools Error Unable To Restore Idevice 29 1
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.
Error 31
Baseband problem.
Error 34/35/36/37
Here is the guide for you.
Error 39
Here is the guide for you.
Error -39
Error 40
Baseband, not excludes power supply problem.
Error 47
3utools Error Unable To Restore Idevice(-78)
Chip problem or communicate CPU
Error 48
Baseband /Chip problem, the chip could be fixed sometimes.
Error 50
Baseband CPU breakdown.Here is the guide for you.
Error -54
Here is the guide for you.
Error 53
Touch ID fingerprint or server certification issues. Here is the guide for you.
Error 56
Baseband/CPU/Chip, mostly is NFC problem. Here is the guide for you.
Error 91
Hard disk problem.
Error 1002
Here is the guide for you.
Error 1003
Baseband or hard disk.
Error 1004
Here is the guide for you.
Error 1005
Hard disk problem, here is the guide for you.
Error 1013
Server certification issues.
Error 1015
Downgrade firmware problem, fix your PC system and flash again
Error 1600
CPU problem.
Error 1601
CPU problem.
Error 1602
USB power supply or system problem.
Error 1611
Hard disk problem.
Error 1639
Error 1669

Chip file is incorrect or losing.
Error 2002
Check the connection with Apple server.
Error 2003
Change USB or PC.
Error 2009
Change PC, try to flash multiple times.
Error 3004
Battery, cables, USB ports not stable.
Error 3014
Error 3049
CPU problem
Error 3194
Error 4005
Hard disk, hard disk power supply, or change another PC try again. Here is the guide for you.
3utools Error Unable To Restore Idevice(-29)
Error 4013
Here is the guide for you.
Error 4014
Here is the guide for you.
Error 4015
CPU problem.
Error 0xe800006B
Check USB cable, and iDevice's connection.
Error DXEXXXX
Install iTunes to your Hard disk 'C 'on your computer.
3uTools will make another tutorial if you have met other Error codes, please send us feedback kindly.
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