LTE-A, short for Long Term Evolution Advanced is the next generation of LTE. It employs the use of carrier aggregation in order to drastically increase LTE speed.
Per Wikipedia (https://en.wikipedia.org/wiki/List_of_LTE_networks#Africa), Mauritius has been among the first to introduce LTE in Africa. All three mobile operators currently operate their LTE network on Band 3 (1800 MHz) and all spectrum available have already been allocated. In order to make use of carrier aggregation, new bands would have to be used.
Recently, the Information and Communication Technologies Authority (ICTA) has decided to allow operators to operate LTE on Band 8 (900 MHz) (https://www.icta.mu/documents/decision_refarming900MHz.pdf). As compared to Band 3, Band 8 has a lower bandwidth capacity, however it has better penetration capability as compared to the higher frequencies of Band 3. This will definitely improve LTE indoors.
The addition of Band 7 (2600 Mhz) would also be appreciated due to its high bandwidth capacity, especially for Fixed Wireless Broadband such as Airbox through the use of an outdoor modem.
The right decision has and will always be to ditch FTTA and Wi-Fi based technology such as Cambium, Ubiquiti, etc and move over to technology designed for high speed fixed wireless broadband (4G, 5G).
New LTE modems with support for LTE-A/4G+ in Mauritius. The model is Huawei B618s-22 with a theoretical maximum speed of 582Mbps in a 4*4 MIMO configuration.