What is the reason for iphone4 flashing 29

Check for hardware issues.

Error or 1669.

Your device or computer might have a hardware issue that prevents the update or restore operation from complete.

Then try to restore your iOS device two more times when you're connected to a known good cable, computer, and network.

Make sure your security software and settings allow communication between the device and the update server.

If you're still seeing the error message, check for outdated or modified software.

Hello, your question is not very clear.

iPhone Flash Error**: Error 29.

Solution: Flash the router again after resetting it, and flash the router in DFU mode.

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1.The reason is that the battery is damaged, or the battery is assembled, resulting in the upgrade failure, and the flashing error is unknown error 29, and the solution is to replace the original battery after flashing.

2.Unscrew the bottom screw with a five-star screwdriver. The back shell is removed by pushing it up.

3.Unscrew the battery screws on the host battery for a total of two and remove the battery. Take the new battery and put it back in place.

The steps to flash the machine are as follows;

Connect iTunes, turn off your iPhone, press and hold the Home button and the Power Off button at the same time for 10 seconds, release the Power Off button, continue to press and hold the Home button until you see the device recognized in DFU state on the computer, after the computer prompts, release the Home button, select the recovery option button on iTunes, and click Confirm Recovery in the pop-up selection box.

3.Next, iTunes will pop up a page prompting that everything will be erased, and it will also verify the recovery with Apple servers, when the verification and extraction of files are completed, iTunes will automatically reinstall the **good firmware version for the iPhone, wait for the installation to be successful, and reactivate the iPhone.

Apple 4s automatic power on and off flashing machine with unknown error 29 What's going onThe solution is:

1. Ensure that the network environment is good, if you use ** service, please try to turn it off.

2. Upgrade iTunes to the latest version.

3. Modify the system hosts and restore the tampering with it by other software.

Normally, we do this by putting the Apple iPhone into recovery mode and then flashing it with iTunes. Please press and hold the power button on the top of your iPhone first, and then slide to power off when the power off option comes out.

After shutting down, the next step is to start the operation steps to enter recovery mode

1. Press the power button to turn on, the Apple logo will appear on the screen, do not release the power button;

2. Then press and hold the home button on the home screen until the screen goes black.

3. When the screen is black, please release the power button and continue to press and hold the home button on the home screen until iTunes on the computer side detects an iPhone in recovery mode;

Note: If you don't enter recovery mode, it turns on normally, please try a few more times.

To flash an Apple iPhone, you'll need to recover your files. This file can be done manually or by iTunes itself. You can flash your phone either way, and you may be able to do it manually faster than iTunes.

Here's how to get iTunes firmware automatically restored for your iPhone. In the iTunes window, click the "Restore iPhone" button, then iTunes will connect to the Internet to detect the latest firmware system suitable for the current phone, and prompt us if we want to delete all data and restore, click the "Restore" button to start, then please wait patiently for the iTunes** firmware, and flash the firmware system to the Apple iPhone.