Hello,
In the Specifications of Chateau LTE12 description, in Mobile part for 3G Category is described:
R8 (42.2 Mbps Downlink, 11.2 Mbps Uplink)
Is there really support Dual Carrier for 3G Upload or its only 64 QAM for default Single Carrier Uplink?
You ask answered question, read this:
http://forum.mikrotik.com/t/r11e-lte6-modem-support-dc-hspa/139515/1
And use Search next time