Is the loan contract downloaded via SMS valid?

Valid.

If the SMS loan contract is edited and issued by the borrower personally using his or her mobile phone number, and the content has not been modified, it is also valid. The mobile phone number of the text message is also owned by the borrower, and the content of the mobile phone text message has not been modified by the lender. In this case, the loan contract related to the mobile phone text message is fully effective.

SMS: SMS for short, is a text or digital message sent or received directly by a user through a mobile phone or other telecommunications terminal. The number of characters a user can receive and send in a text message each time is 160 English or numeric characters.