Hello, I am about to purchase a phone from an online. The seller claims the following information: 2.5G (EDGE, GSM/GPRS ) MHz:850, 900, 1800, 1900 3.5G (HSPA+, UMTS/WCDMA ) MHz:850, 900, 1700, 1900, 2100 4G (LTE ) Bands:2, 4, 5, 7, 17 Will this phon...