It seems Verizon's "there's a map for that" AT&T bashing campaign has not gone down well with the latter's legal department.

AT&T is suing Verizon and has filed a motion to get the adverts pulled as it considers them "misleading".

As those who've seen the spots will know, the adverts compare Verizon's 3G coverage with AT&T's using red and blue splotches across a map of the States.

Verizon is a 3G network, so its coverage looks rather more impressive than AT&Ts, which covers a lot more of the States than is shown, but just not 3G.

"We believe the ads mislead consumers into believing that AT&T doesn't offer ANY wireless service in the vast majority of the country", says AT&T in the legal complaint.

The iPhone operator goes on to speculate: "Verizon's misleading advertising tactics appear to be a response to AT&T's strong leadership in smartphones".

We will keep you posted with developments.