We all know AT&T’s wireless service is, well, less than perfect. But at least they’re working on it, making about $450 million worth of improvements in the LA area over the last two years. Here’s an example: last week the technology giant installed a cell site inside the historic National Bank of Whittier buildingin uptown Whittier, California to boost its coverage in that area. The six-story Beaux Arts-style landmark building, home to Richard Nixon’s first law office and recognized on the National Register of Historic Places, was designed by Los Angeles father and son architect team John and Donald B. Parkinson in 1923. To preserve the building’s charm, the antenna site is fully concealed inside specially-built radio cabinets located on the top floor.  The site is the only completely indoor one among 15 other Whittier cell structures. Other upgrades in the LA area (and there are a slew—many look, ahem, like trees) include a site close to the Chateau Marmont and one near the Greek Theatre.