You can add the chairman and staff of the Federal Communications Commission to the list of those who believe AT&T’s deal to acquire T-Mobile USA would hurt competition.

Apple is currently the second-largest PC vendor worldwide, after Hewlett-Packard. But by this time next year it may be the first — if you count the iPad as a PC.

The head of the Federal Communications Commission will seek an administrative hearing on AT&T Inc.’s proposed $39 billion deal to acquire T-Mobile USA, according to a person close to the matter.

The move by Julius Genachowski, the FCC’s chairman, would be a setback for the two companies that are already facing opposition from the Justice Department, which filed a lawsuit to stop the deal. The FCC’s move would be another obstacle for the two companies to overcome. The agency’s hearing would happen the conclusion of the antitrust trial, according to this person.

Looks like Apple’s sprawling intellectual property battle with Samsung could draw some unwanted attention from the European Union Competition Commission. Evidently, EU regulators are growing concerned that the battle itself could be stifling competition in the mobile space, and they’ve begun talking to the parties involved.