The initial setup MUST be done over a wired connection, but as soon as an access to internet is provided via wired connection you can move over to the LTE and it will Merakily just work with LTE as primary uplink.
I´ do not know if you have to use wired connection with the Z3 to connect but I assume so for initial setup.
//
//
LITHIUM.InformationBox({"updateFeedbackEvent":"LITHIUM:updateAjaxFeedback","componentSelector":"#informationbox_53590a99fc530","feedbackSelector":".InfoMessage"});
LITHIUM.InformationBox({"updateFeedbackEvent":"LITHIUM:updateAjaxFeedback","componentSelector":"#informationbox_53590a99fc530_0","feedbackSelector":".InfoMessage"});
LITHIUM.InformationBox({"updateFeedbackEvent":"LITHIUM:updateAjaxFeedback","componentSelector":"#informationbox_53590a99fc530_1","feedbackSelector":".InfoMessage"});
LITHIUM.InformationBox({"updateFeedbackEvent":"LITHIUM:updateAjaxFeedback","componentSelector":"#informationbox_53590a99fc530_2","feedbackSelector":".InfoMessage"});
LITHIUM.AutoComplete({"options":{"autosuggestionAvailableInstructionText":"Auto-suggestions available. Use Up and Down arrow keys to navigate.","triggerTextLength":4,"autocompleteInstructionsSelector":"#autocompleteInstructionsText_53590a1fbc344","updateInputOnSelect":true,"loadingText":"Searching...","emptyText":"No Matches","successText":"Results:","defaultText":"Enter a search word","autosuggestionUnavailableInstructionText":"No suggestions available","disabled":false,"footerContent":[{"scripts":"\n\n;(function($){LITHIUM.Link=function(params){var $doc=$(document);function handler(event){var $link=$(this);var token=$link.data('lia-action-token');if($link.data('lia-ajax')!==true&&token!==undefined){if(event.isPropagationStopped()===false&&event.isImmediatePropagationStopped()===false&&event.isDefaultPrevented()===false){event.stop();var $form=$('