Unifi Mobile has intraband CA (B38+B38 & B40+B40) at some locations, eg. TM Tower area (can detect it if you are located at Universiti & Kerinchi LRT station), underground MRT station (Merdeka & Bukit Bintang station), this is the reason why 4G+ shows up on Unifi Mobile but not other telco as other telco are using interband CA instead.