Apple would be spending half its cash pile to acquire a domestic company.

Nearly two-thirds (62%) of the company's sales are international [1]; furthermore, I would guess that much of the company's growth is in international markets, especially in Asia.

Unless Apple is seeking to improve its operational expertise in running carriers in order to buy up carriers throughout the world, this acquisition would be a very curious one.

[1] http://www.apple.com/pr/library/2011/07/19Apple-Reports-Thir...