Kanye West has given Kim Kardashian West three phones.
The 'Stronger' hitmaker is reportedly so concerned about the safety of his wife and their 18-month-old daughter, North, that he asks her to "check in" with him once every hour.
A source revealed to the Daily Star newspaper: "Kim has one phone solely to use to ring and text Kanye. He calls it her 'security' phone.
"One is used purely for work, and the other for her family and two personal trainers."
Meanwhile, the 37-year-old's step-brother, Hal Carmichael, recently revealed that Kanye "controls" the 'Keeping Up With The Kardashians' star in order to "protect" her.
He previously said: "Kanye constantly worries about Kim and North because he knows the kidnap risk is high.
"Because of the lifestyle they lead, he has to think about it carefully nowadays.
"Kanye controls Kim, like where she travels and what she does, to protect her. He thinks the more the public see of them, the more at risk they are."
Kanye's "protection" extends out to his daughter, North, with only a few people allowed to look after her.
Hal continued: "Kanye keeps his inner circle tight - with North she'll only be looked after by her grandmother Kris [Jenner] or her aunties.
"They have a nanny as well, but North is kept around family. Kanye does this to protect her."