KDDI has just launched the first QuadHD (QHD) phone solely for the Japanese market, the Isai FL model built by LG. That gives us a preview of LG's G3's 5.5-inch 2,560 x 1,440 display and its record 538ppi resolution. As it happens, LG just announced that the panel has now been certified, and re-confirmed that it'll be installed in it's "forthcoming flagship smartphone," ie the G3. KDDI's model may give us an idea of what LG's eagerly-awaited G2 successor will be like spec-wise, too. The Isai FL has the narrow bezels we saw in leaked images of the G3, but sports a different design lacking the LG's rear buttons and rumored metal back. It also has some of LG's Knock functions and will come in three colors with a 13-megapixel camera, 3,000mAh battery, 2GB of RAM and a quad-core Snapdragon 2.5GHz CPU. That lines up with some of the G3's rumored specs, but we won't have to wait long to know them -- it's set to arrive on May 27th.