iPhone4 won t upgrade and won t factory reset 30

When upgrading, you must ensure that your C drive has enough space, about 1-2G, because iTunes will automatically store the firmware to the C drive. If this doesn't work, just format your iPhone directly, settings, and there is a restore option in the general. Cydia source can not be deleted, can only be deleted by upgrading the system or restoring the system, the restoration is a bit unlikely, you need your original version of shsh to restore, I don't know if you save it, you need to use a software to back up shsh before, if you haven't backed it up, you can't restore.

The landlord actually doesn't need to upgrade, there is no perfect crack, and everything needs to be used. It's very stable, and it's not very power-consuming, so it's recommended that the landlord don't upgrade, and wait until it's perfectly cracked.

It's easy to restore the factory! Set the general Restore to erase all the data and restore.

Settings - General - Restore - Erase all data and restore.

Tool Material: Apple 4 phone.

1.First, in the standby state, click the settings icon to enter the user settings page.

2.Click on the general option in the settings to go to the next page.

3.After entering the general, take the screen to the bottom, find the Restore this vertical hall item, and click to open it.

4.After entering the restore page, click Reset All Settings.

5.A window will pop up to enter the password, enter the password to factory reset.

After the factory reset, you need to activate the iPhone by connecting iTunes on the computer, you just need to connect iTunes and then it will prompt you to check a SIM card into it, and then it will be activated, and iTunes will prompt you to set up a new iPhone or restore the backup iPhone

iPhone4 can't be used after factory reset, you can make the phone into DFU mode, and then re-enter the phone. The steps are as follows:

1. Press and hold the home and power buttons for 10 seconds - release the power button but the home button continues to press for 15 seconds, and the phone screen is black.

2. Install the latest jailbreak software on the computer, open the software to identify the phone, and the software jumps to the installation mode immediately after the phone is connected to the computer, indicating that it has entered the DFU mode, and this process does not require the mobile phone to perform jailbreak operation.

3. Start your phone and check if the phone fault has been eliminated.