As you might Know, some Operators already are implementing LTE CAT 6 infrastructure and hence the need to test and evaluate reliability as well as speeds.
As of this moment only one device is capable of making diagnostic reports compatible with Drive Test software.
This device is Samsung Galaxy Note 4, and models are;
Samsung Galaxy Note 4SM-N910F -LTE FDD700/800/850/900/1800/1900/2100/AWS/2600 (E-UTRA bands 17, 20, 5, 8, 3, 2, 1, 4, 7)
WCDMA 850/900/1900/ 2100
Quad band GSM
HSPA 42.2/5.76 LTE Cat 6
Samsung Galaxy Note 4 SM-N910G-LTE FDD700/850/900/1800/1900/ 2100/AWS/2600 TDD 2300/2600 (E-UTRA bands 28, 5, 8, 3, 2, 1, 4, 7, 40, 38)
WCDMA 850/900/1900/ 2100
Quad band GSM
HSPA 42.2/5.76 LTE Cat 6
HSPA 42.2/5.76 LTE Cat 6
Of course, both Devices should contain Engineering firmware.