When LG announced its Q4 2012 results, the company announced that it will be focusing on LTE-enabled phones, which included the launch of the new F series. After a bit of teasing (http://www.gsmarena.com/lg_teses_l_v_f_g_mwc_2013-news-5564.php), the F series is now official with the LG Optimus F5 and Optimus F7.