T-Mobile has asked the FCC to block Verizon's purchase of spectrum from SpectrumCo — an alliance between Comcast, Time Warner, and Bright House to sell off unused spectrum allocation in the AWS band. In an FCC filing, T-Mobile states that the deal would give Verizon control over an "excessive concentration" of wireless spectrum. Verizon's deal would see it acquire licenses for the AWS band in a number of areas for use in its LTE rollout. Verizon is yet to comment on the matter.

Somewhat ironically, T-Mobile's move reminds us of Sprint's loud, repeated objections to AT&T's proposed acquisition of the number four carrier throughout much of 2011 — and in the absence of that deal, most (if not all) of Sprint's concerns now fall on T-Mobile's shoulders as well.