I probably missed your call cause I was boarding the plane
Or some other shit

from Wiz Khalifa (Ft. Juicy J) – Stackin (Bonus Track) Lyrics on Rap Genius

Meaning

Wiz does not actually mean an actual phone call.
He is too busy living his rich comfortable life, which does not give him time to listen to the things people have to say about him.

p.s. as most of you guys may know, phones are not allowed on most planes, especially during lift off, this is because, “cell phones which can broadcast a signal may interfere with the aeronautic equipment on the plane.”

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