All the headlines may be about 5G, but far more operators are focused, in the short term, on upgrading their LTE networks to support improved coverage and capacity, and new use cases. Last week, we reported on UK operator EE’s move to five-carrier aggregation (5CA) and elements of LTE-Advanced Pro (Release 14, the latest set of 4G standards). Now Singapore’s Singtel is making similar moves, using advanced carrier aggregation to push its 4G speeds to 1.5Gbps. With Apple announcing LTE-Advanced on its latest iPhones, but offering no timetable for 5G, there are many good reasons for operators to continue to expand 4G. Many MNOs will ‘go live with 5G’ by turning on a few base stations as a showcase city…