The 1-2 punch of T-Mobile and the CTIA isn’t letting up against mobile WiMAX hopeful M2Z Networks.

M2Z wants to build a nationwide network, offering free service, using AWS-3 spectrum.  Incumbents led by T-Mobile and the CTIA, but also including AT&T, MetroPCS, handset maker Nokia and others, say that existing AWS-1 networks will suffer significant interference if M2Z enacts its plan.  M2Z, in its defense, says the incumbents are just trying to protect their profit margins.

In recent weeks, the incumbents and M2Z publicly argued back-and-forth, however, this week T-Mobile and the CTIA issued several statements including another from the CTIA today.

In the current statement, the CTIA argues that M2Z is improperly using U.K.-based research, which differs from technical aspects of U.S. networks.

Curiously, M2Z has not responded to the attacks since last week.  Nor has the FCC commented.