@Joseph-TP Thank you for reply. I've done a reset/power cycle of both the NBN box and C4000 router over the weekend. Same thing. 1st test 8:48pm - 796.1/92.7 2nd test 9:20pm - 753.7/91.2 3rd test...

Hello, Original internet plan was 200dl. Switched plan to 800/50, I'd get around 700/50-800/50 upon router reboot. which is OK if it maintained that speed. Unfortunately no, it'll drop to 350/50...