There is no invoice to guarantee, but you should provide relevant information to the official customer service to help you and the outlets report.
Related information: refers to the purchase record. If it is bought by Taobao, there will also be a purchase record. There may also be an order number and a purchase record.
How to operate:
1. Open Mito mobile phone official website, and click Service Support in the navigation bar above.
2. Pull down and find the online customer service consulting service to open.
3. According to the instructions of online customer service, provide the official customer service with relevant information about mobile phones, so that the customer service can help you and outlets to report.