There are two different hardware versions for the XT925, they have different LTE Radios, One have 700/1700 the other 800/1800/2600. Very hard to tell which one is which just by looking at them. What was original firmware in both phone before unlocking the bootloaders? If the phone is from Europe or Australia it should have 800/1800/2600, if it is from Canada then it is 700/1700, from Latin america could be any of them depending on the country.
Motorola Razr HD XT925
Retired devices: sony Xperia P, Motorola Atrix HD - SonyEricsson Xperia neo - Nokia E63