Ok just got galaxy s5 four days ago. For first couple of hours I had 4G and good service. (Texts ect.) Ever since then has 3g and fails a lot of texts. So far from reading the mass of other posts with this same issue I've tried. Changing settings from global to lte/CDMA and restarting phone. Checking and removing/reinstalling sim. Removing from Otterbox case. Help! Also some message comes up saying some service has failed every time I restart