SAN FRANCISCO — Facing allegations it overcharged the government for wiretaps and other court-authorized surveillance, Sprint Communications Inc. has beefed up its defense team with lawyers from Williams & Connolly.

Washington, D.C.-based partners R. Hackney Wiegmann, Dane Butswinkas and Edward Barnidge entered appearances for the company on Monday in U.S. v. Sprint, 14-962, filed last month in the U.S. District Court for the Northern District of California.