The sender's mobile phone number could not be found.

The short message received by your mobile phone shows that the sender is unknown. We suggest you try to receive short messages from other contacts:

1. If the information sent by other contacts can be displayed normally on the mobile phone, it may be related to the SIM card used by that contact.

2. If the message sent by other contacts still shows "Unknown sender", we suggest you:

1). Check whether it is caused by downloading third-party information software, uninstall and try again.

2). Back up data (contacts, text messages, photos, etc. ) and restore factory settings (Settings-Reset/Privacy-Restore Factory Settings).

If the problem still exists, it is recommended that you take the machine, purchase invoice and warranty card to the local Samsung after-sales service center for testing. For specific inquiries about the service center, please visit.

Samsung knows to provide you with high-quality solutions and answer your questions attentively, hoping to get your satisfactory evaluation.