A Kenyan man who lost his mobile called the number from his landline and his dog's stomach started ringing.
Kamal Shah from Mombassa said his German Shepherd Snoopy swallowed the phone.
Snoopy had an operation to remove it. Both mobile and dog are reported to be fine.
The dog owner said he left his phone on a bedside table and assumed his son had taken it. He said he didn't expect the mobile to start ringing inside his dog.
He said: "It sent me into shock."