How does Samsung mobile phone send short messages in garbled code?

According to the situation described by the landlord, it may be a problem with the mobile phone system. It is suggested that the landlord should try to restore the factory settings of the mobile phone after backing up the data of the mobile phone. If the same situation still exists, it is suggested that the landlord contact the mobile phone manufacturer to check or upgrade the system after sale. If there is no hardware failure in the mobile phone, the problem should be solved.