Nighthawk M1 EUS: 4x4 MIMO Support?

[Schutti]

In the german PDF, there is a List of Band with 4x4 MIMO Support: 1,3 and 7.

But the M1 supports the 2600 MHz TDD Band too.

Can the M1 use 4x4 MIMO on Band 38 too?

Band 7 (2600 MHz TDD) and Band 38 (2600 TDD)

Can the M1 use a TDD Band and one or more FDD Bands with CA?

For example Band 38 and Band 1 or Band 38 and Band 3?

[Schutti]

No answer?