Hello @Lai & @sitloongs & @TK_Liew,
We can confirm that the data usage monitoring appears to be working in the MBX HD4 with firmware version 8.0.1 build 3560 (Firmware 8.0.1 RC1).
Happy to Help,
Marcus 
Hello @Lai & @sitloongs & @TK_Liew,
We can confirm that the data usage monitoring appears to be working in the MBX HD4 with firmware version 8.0.1 build 3560 (Firmware 8.0.1 RC1).
Happy to Help,
Marcus