The Verizon Wireless-Alltel acquisition has caused the FCC to review other carriers and it has found that Deutsche Telekom is violating U.S. law by owning too much of T-Mobile USA. Deutsche Telekom owns 30% of T-Mobile USA, and the legal limit states that foreign entities cannot own more than 20% of an entity controlling a common carrier license. The FCC sent T-Mobile USA a letter asking how it might come into compliance with the law. T-Mobile has 30 days to respond and is considering its options, which could entail some simple paperwork.