confusing at first, but still cool :)
to skip all the company calling crap, insert no money, dial 5675, the coin return twice to get key. get socket, too and combine with screwdriver(locked panel,use key), unscrew the hexagonal bolts by the red lever, the spell "THE TELEPHONE IS INHERENTLY OF NO VALUE TO US". the booth door unlocks, and you escape!!! :)
this process above should take about 1:45:00 Enjoy!!!