Yes, now you don't even read the invoice of the basic mobile phone. The national warranty has the phone number, and the official mobile phone has the warranty number. The warranty time will be recorded, but only if your mobile phone has not been disassembled without permission. If it is disassembled, there is a charge for maintenance.

Consumer information, purchase date, product model, factory date, warranty period and scope, maintenance records, etc. It is generally indicated on the mobile phone warranty certificate.

There are two kinds of warranty: a certain period of warranty and a lifetime warranty. Products with warranty mainly refer to electronic and electrical products, vehicles, machinery and equipment, etc. Powerful companies also pay more attention to the influence of after-sales service on efficiency. Products with good after-sales service include national warranty, multinational company and global warranty service.

Related information:

In the field of after-sales service and consumer protection, many consumers (including the staff of some consumer protection organizations) do not know the concept of warranty and warranty. When consumers buy goods, the merchants make a three-year, five-year or even lifetime warranty commitment. When there is a fault that needs to be repaired, they will receive a list of replacement parts and maintenance labor costs. The merchant explained that "warranty" is not "warranty".

Many operators make use of the difference between "warranty" and "guarantee" to make a fuss about this issue, and put forward different interpretations of these two words from the perspective of safeguarding their own interests. They think that "warranty" is the free maintenance provided by producers or sellers for product failures, while "warranty" is the paid maintenance provided for product failures, which causes consumers' confusion in understanding these two concepts.