JollaHQ already confirmed LTE bands to be bands 3 (1800 MHz), 7 (2600 MHz), 20 (800 MHz). https://twitter.com/JollaHQ/status/417963197564747776 LTE 850 makes no sense. Its not used in neither Europe nor China, nor could they cover 6 continents with it. Hardly any networks anywhere use it.
Truly is the LCD controller/screen