As to the iOS firmware versions below iOS7.0, it’s not required to care about Apple’s closing the firmware signing; you can still “backup SHSH from device” even though the Apple has stopped the firmware signing. 3uTools for iOS Users has 17,170 members. Step2: After it’s connected successfully, click “Flash & JB→ Easy flash”→ select the available iOS firmware for your iPhone→ click “Flash”. Note: Don’t select “ Retain User’s Data While Flashing”. Step3: 3uTools will automatically download the firmware and flash your iPhone, you just need to wait until this process ends. The Apple iPhone 5c was announced on September 10, 2013. Repair of this device is similar to the previous models, and requires screwdrivers and prying tools.

  1. 3utools Firmware Check Code Error Codes

Problem Description:

This error is typically caused by attempts to downgrade the iPhone, iPad, or iPod touch’s software. This can occur when you attempt to restore using an older .ipsw file. Downgrading to a previous version is not supported. To resolve this issue, attempt to restore with the latest iPhone, iPad, or iPod touch software available from Apple. This error can also occur when an unauthorized modification of the iOS has occurred and you are now trying to restore to an authorized, default state. Very rarely this error is caused by a hardware issue and requires service.


Step1: Set your iDevice into DFU mode.

  • Hold Home button and Power button simultaneously for 10 seconds till the screen becomes black, and then release Power button. Bmw car 4k wallpaper download.

  • Continue pressing Home button for fifteen seconds. You’ve successfully set iDevice into DFU mode if you can see an iTunes logo on iDevice’s screen.

Click to enter DFU mode and Recovery Mode

Step2:Launch 3uTools. After connecting iDevice to PC using the USB cable, 3uTools can check this iDevice in DFU mode automatically.

You’re suggested to back up this iDevice using 3uTools first. Choose an available firmware and click Go Flash to restore your iPhone.

Then please keep a good network connection between iDevice and PC, and then wait until this process is completed.

You could check here for moreerror codes roundup in 3uTools/iTunes.

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Did you encounter any error codes in 3uTools when you flashing an iOS firmware?

Here is the solution about how to fix 'Error: Unable to read ECID(Normal)', as below:


Why did this error happen?

  1. A Broken cable

  2. Unstable USB port

  3. Abnormal driver

  4. Partly hardware problem

How to solve the problem?

3utools Firmware Check Code Error Codes

  1. Change an original cable and try again

  2. Use a rear USB port on your PC

  3. Fix iTunes driver problem in 3uTools

  4. Restore in iTunes

  5. Ask Apple support if the device still in the warranty. (Connect with 3uTools, check the warranty on the 'iDevice' page)

  6. Check the hardware problem in the local authoritative repair store

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