Some users may meet download iOS firmwares error on 3uTools, even though the network connection is normal.
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Here’s the tips to solve this problem. Check your network connection before you download the firmwares.
Step 1 Right click 3uTools, then then click “Open File Location”.
Step 2 Find out the file named “setting.cfg” and open it to edit.
Step 3 Add “xd=true” below “[Network]” as the following picture.
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Step 4 You can save this new “setting.cfg” at any folder. Then replace this edited file to the folder of 3uTools.
Step 5 Re-launch 3uTools, and download iOS firmwares again.
If the download error still exists, please download the firmware from: http://www.3u.com/firmwares
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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?
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
Firmware Check Code Error Current Md5 3utools Free
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