Problem Description:

Hello, Perform the steps that recommended me but these tests did not work with two IDs using the alternate password, the problem remains the same as the app starts to install but at a given moment stops and closes cydia impactor (the only app I can install is Electra 11.4). Some users may meet download iOS firmwares error on 3uTools, even though the network connection is normal. 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”.

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.

Error -1 on 3uTools may be caused by USB cable connection, network and baseband. Try to change the usb cable, confirm the network connection. If error still exists, you would need to change the baseband. Was this answer helpful? Feb 16, 2018 How to Fix iPhone Stuck on Apple Logo and Restore All Devices iPhone, iPod Touch&iPad Using 3uTools - Duration: 12:04. IHelperPro 161,753 views. 2019- Posted by 3uTools In addition to the release of the betas of iOS 12.4, Apple is also working on the iOS 12.3. The iOS 12.3.1 was released at last weekends, aiming to fix a few issues, for all iOS 12 compatible devices.

Solutions:

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.
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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3utools Network Connection Error