Since most chargers are not grounded (they have only two prongs, not three) this ground is connected to the output wire and floats at about half the mains voltage. You can feel the same “vibration” with other ungrounded electrical equipment like those radios or TV sets with a thin cable and two pronged plug.
Why does my iPhone vibrate 3 times when I plug it in?
Vibrating 3 Times = USB Restricted Mode (i.e. no USB devices will work until you unlock the device).
How do I get my iPhone out of USB restricted mode?
In Settings, go to Face ID & Passcode or Touch ID & Passcode, and turn on USB Accessories under Allow Access When Locked. When the USB Accessories setting is off, as in the image above, you might need to unlock your iOS or iPadOS device to connect USB accessories.
How do I fix USB restricted mode?
To regain access, just unlock your phone with your passcode, Touch ID, or Face ID as you normally would. To disable USB Restricted Mode, go back into your Touch or Face ID settings and toggle USB Accessories back on.
How do I restore my iPhone in recovery mode?
Put your device in recovery mode and set it up again
Make sure that your Mac is up to date. On a Mac with macOS Catalina, open Finder. Keep your device connected and wait until the recovery mode screen appears: Locate your device on your computer. After the Update or Restore completes, set up your device.
What is USB restricted mode on iPhone?
USB Restricted Mode is a setting that forces an iOS device to stop all data communications through its port after a specific period (usually an hour) since the last unlock.
Will recovery mode erase everything iPhone?
Will recovery mode erase everything iPhone? Recovery mode erases everything on the iPhone if you use iTunes to restore your device. With tools like ReiBoot, your files are safe and they do not get deleted when you restore your phone.
Can you restore an iPhone without using a computer?
If you can’t access a computer and your device still works, you can erase and restore your device without a computer.
Why is my iPhone in recovery mode?
You can’t use your iPhone at all while it’s in Recovery mode. Typically, the only way to fix it is to reinstall iOS. The most common reason an iPhone gets stuck in Recovery mode is that a problem occurred during a software update. These problems range from a loss of power to corrupt update files.
