Following a pretty long wait, Asus is almost ready to unleash the entire Zenfone 4 line of smartphones. The company has so far outed the Zenfone 4 Max for some markets, but it hasn't started shipping yet. That's likely to happen in August, while the full Zenfone 4 family may launch in Europe in September. While we wait, a new Asus device has been certified by the US FCC. It has the model number X00ID, and we have in fact seen this one before, in a benchmark run back in May. That revealed most of its specs, and given the timing of the FCC certification we assume this very well could be one...
Source: http://www.gsmarena.com/asus_x00id_clears_the_fcc_might_be_a_zenfone_4_variant-news-26266.php