See, there were basically two Motorola Quark phones -- with two different FCC IDs -- released under THREE model names:
- FCC ID IHDT56PK1:
XT1254 U.S. Droid Turbo/XT1250 U.S. Moto Maxx (identical device, CMDA/GSM/HSPA/LTE bands -- except for model name). The XT1250 will run on Verizon, with a Verizon SIM card. This device has LTE bands 2, 3, 4, 7, 13 enabled.
- FCC ID IHDT56PK2:
XT1225 "international" Moto Turbo/XT1225 "international" Moto Maxx (identical device, GSM/HPSA/LTE bands, except for model names). This LTE bands 2, 3, 4, 5, 7, 17 enabled.
Of the two Quark models -- released under three models names (Moto Maxx, Moto Turbo, Droid Turbo) -- only the one with the model name "Droid Turbo" has locked down bootloader.
The XT1250 U.S. Moto Maxx is basically the "dev" version of the XT1254 "Droid Turbo" if you can get your hands on it. (unlock-able bootloader, can be easily rooted, TWRP installed, etc.)
The Droid Turbo is just one of the Quark phones Motorola released, and NO the device is not and never was "exclusive" to Verizon. Only the "Droid" part of the name is exclusive to Verizon. Motorola even used the "Turbo" name on another Quark phone.
* U.S. Moto Maxx XT1250/Verizon Droid Turbo XT1254. Same device, same FCC ID, different model name. The XT1250 is sold by smaller regional CDMA/LTE carriers and will work on Verizon if you stick in a Verizon LTE SIM card -- just like a non-Verizon Moto Nexus 6. People have done it. The XT1250 has an unlock-able bootloader, can be easily rooted, TWRP installed, etc.
* "International" Moto Turbo XT1225/Moto Maxx XT1225. Same device, both XT1225 models have the same FCC ID, different model name for different part of the world. LTE bands 2, 3, 4, 5, 7, 17. I'm running two of them on AT&T with CM12.1