@Coconut Sorry to respond late. May I know when did you purchase this VR2800? As always mentioned when replying to our customers related to purchase advice, we don't suggest our customers buy a...

@Syridian Hi, is your VR900 v2 or v3? Please show us the device bottom label. There is a newer firmware for VR900(AU) v2: https://www.tp-link.com/au/support/download/archer-vr900/v2/#Firmware Did you...

@unfcukinghappy Have you updated the modem firmware to the latest, then reset and reconfigure it from scratch to confirm if the connection will more stable?...

@AKO52 Sorry for the late response. Can we have the modem device label display the region version and hardware version? This seems quite interesting that the same hardware cannot work on the same...

@Matthew1 Hi, glad to hear that you worked this out, congrats.^_^ Good day~

@DaZzleFM You can download and install the latest firmware again on your VR400, then confirm if the firmware version is newer.