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Kanye West doesn't own a mobile phone, according to Justin Bieber.
Justin told MTV: 'It's funny, because he doesn't even use a phone, he just sends emails.
'It's so crazy. I'm like 'how can you not use a phone?'
The two worked on a remix of of Justin's 'Runaway Love'. 'I'm really excited,' Justin said about the collaboration. 'It was amazing. He's such a cool guy, and he's just really laid back and just nice, and at the end of the day, he's just a nice person.'