How to erase your iPhone
Step 1. Download and install Tipard iPhone Eraser on your computer.
Download and install iPhone Eraser. Launch the program and then connect your devices to the computer via USB cables. They will be automatically detected.
Step 2. Set erasing level
Select data erasing level at your will.
You can choose to erase your iPhone at
Low level: Overwrite data once;
Medium level: Overwrite data twice;
High level: Overwrite data for three times.
Step 3. Start to erase iPhone
Click "Start" button to erase all contents and settings from your iPhone.