“what are they frequency signals? Hello, I need to know what are the frequency signals then use this phone (GSM 850/900/1800/1900, UMTS 850/900/1700/1900/2100, LTE Cat4 700/850/1700/1900/2100/2600 (Bands 2,4,5,7,12,13,17,28) etc... I will buy it there, but, I will use it in Argentina.”