Inter-eNB carrier aggregation is possible and standardized (in the more recent releases) although it requires a unified backend core, so it won't be of much help until the transitional period has ended.
Does anyone have any pull to get a Magic Box Gold w/ voice amp? I have a gen 2 which works great for LTE but could really use the voice solution. The Airave doesn’t work for me as I don’t have a internet connection for it. I was promised by care like 5 times and then finally informed they are only for business accounts now.