I am looking to pick up a Docomo unlocked Z5 Premium next month...I believe the frequency specs listed below are accurate, but I am trying to figure out where I will get LTE (if anywhere). My current phone is a Docomo S4 that gets HSPA reliably on 850mhz on ATT and in Canada on Fido/Rogers but no LTE. The Sony appears to include Band 17-700mhz, so I assume that is the basic LTE band that should cover me in most places served by ATT and I will default to HSPA on 850mhz where ATT does not use Band 17?

Cellular Networks: GSM850, GSM900, GSM1800, GSM1900, UMTS800 (B6), UMTS850 (B5), UMTS2100 (B1), UMTS800 (B19), LTE2100 (B1), LTE700 (B17), LTE1800 (B3), LTE2600 (B7), TD-LTE2600 (B38), LTE800 (B19), LTE1500 (B21), TD-LTE1900 (B39), LTE700 (B28)

Cellular Data Links: GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE, LTE-A