The B715-23c gets you 3CA but not 1/3/32 as a combination but has 1/3/20 as a combo and 3/20/32.
* Carrier Aggregation：
-- (4G)2CA: CA_1A-3A, CA_1A-7A, CA_1A-8A, CA_1A-20A, CA_1A-28A, CA_1A-38A, CA_1C, CA_3A-7A, CA_3A-8A, CA_3A-20A, CA_3A-28A, CA_3A-32A, CA_3A-38A, CA_3C, CA_7A-7A, CA_7A-8A, CA_7A-20A, CA_7A-28A, CA_7A-32A, CA_7C, CA_20A-32A, CA_20A-38A, CA_38C
-- (4G)3CA: CA_1A-3A-7A, CA_1A-3A-8A, CA_1A-3A-20A, CA_1A-3C, CA_1A-7A-20A, CA_1A-7C, CA_3A-7A-8A, CA_3A-7A-20A, CA_3A-7A-28A, CA_3A-7A-38A, CA_3A-20A-32A, CA_3C-7A, CA_3C-20A, CA_7A-20A-38A
But the combination will work for some masts, I already have 3 and 20, so does the mast get 1 or 32, seems the B715 will cope with both possibilities.