How to charge for the permanent deletion of Nanjing mobile phone data?

1. Charge by project: charge by project according to the type and quantity of data to be deleted. For example, different data types such as address book, short message, photo and video need to be deleted, and each item is charged separately.

2. Charge by time: Charge by time according to the quantity and complexity of deleted data. For example, if you need to delete all the data in your mobile phone and erase it completely, you will be charged according to the time you need.