The Sony Xperia E4 quietly sneacked onto the stage yesterday and the announcement was so quick we didn't even get a launch date and a price. Clove UK has answered both of these questions by putting the new handset on pre-order. It's priced at £100 and will be available in late March. Clove also cleared up the OS situation - the Xperia E4 will launch with Android 4.4.4 KitKat and get 5.0 Lollipop later. Note that the price is for the single-SIM version, there's another one with two SIM slots but there's no price for it yet. Expansys is also accepting pre-orders but hasn't listed a price or a launch date. We couldn't find it in other stores for now. Three UK has a post about it, which just speculates on price but points to mid-February as the launch...
Source: http://www.gsmarena.com/sony_xperia_e4_goes_on_preorder_in_the_uk_at__pound100-news-11169.php