Nexus 4 priced at £390 by purported Carphone Warehouse in-store display placard

Oh, Carphone Warehouse -- it just can't seem to keep what it knows about the LG / Google Nexus 4 under lock and key. Just days after briefly listing the phone on its website, purported in-store displays for the yet unannounced device have leaked out to Android Authority. While essentially of the details are the same as what we saw last (1.5 GHz Snapdragon S4 SoC, 8MP cam, 12-hour talk time rating, etc.), the listing reveals that the "sim-free" phone itself will sell for £390 (about $504) -- p...