So far the octaband LTE king has been the Sony Xperia Z Ultra, but it turns out that there will be four model numbers for each of the newly-announced 5S and 5C, depending on the region they will be sold at, with 7-13 LTE bands support each. The most bands are supported by the model that will be sold on Sprint and the Japanese carriers SoftBank and KDDI, so if you pick that one unlocked, there is a good chance it will work on most LTE networks worldwide...Source: http://www.phonearena.com/news/Apple-iPhone-5S-and-5C-set-new-LTE-record-US-carrier-versions-sport-up-to-13-global-bands_id47325
