“What's the difference between this phone and the G920T? What's the difference between this phone and the G920T phone listed below? I have T-Mobile and need to be able to use Band 12 and VOLTE, and would like to save $200 by purchasing this phone which looks the same as the G920T model. http://www.bestbuy.com/site/samsung-galaxy-s6-4g-lte-with-32gb-memory-cell-phone-black-t-mobile/7078416.p?id=1219668785625&skuId=7078416&ref=06&loc=01&ci_src=14110944&ci_sku=7078416&extensionType=pla:g&s_kwcid=PTC!pla!!!75144772935!g!!80811489855&kpid=7078416&k_clickid=ad517735-378a-4d76-bca1-c3af81ea2860&lsft=ref:212,loc:1&ksid=ad517735-378a-4d76-bca1-c3af81ea2860&ksprof_id=10&ksaffcode=pg203&ksdevice=t”