B12 (700) is Band 12 on 700 MHz . B13 (700) is Band 13 on 700 MHz. B17 (700) is Band 17, on 700 MHz. B18 (800) is Band 18 on 700 MHz. B19 (800) is Band 18 on 800 MHz.
B12 (700) is Band 12 on 700 MHz . B13 (700) is Band 13 on 700 MHz. B17 (700) is Band 17, on 700 MHz. B18 (800) is Band 18 on 700 MHz. B19 (800) is Band 18 on 800 MHz.