@rongonsalves That is great to know. May I have a picture of the original adapter as well as the new adapter you've replaced with now? Are they both 12V-1A? May I know where did you purchase this...

@AndrewJL Please refer to this guide to confirm the basic settings on the router: https://www.tp-link.com/support/faq/2468/ If other internet sources working fine, you can try to change the DNS...

@MJD58 Can we confirm what are the bands that the 4G base station provided by Telstra? MR400 supports the below: 4G: FDD-LTE B1/B3/B7/B8/B20 (2100/1800/2600/900/800 MHz) TDD-LTE B38/B40/B41...

@Themelster Hi, please go to Advanced > Network > Internet to verify that Data Roaming is enabled on the router web GUI, and ensure also your SIM card does enable roaming. You can test it by...

@rongonsalves I see. May I know when did you purchase it? Does this issue happen recently? Are there any change in the network, such as firmware updating, power outage, etc., anything that you were...

@Gunt Try to login to the router web GUI to confirm if the wireless network name had been changed, then run a Wi-Fi analyzer on a computer to confirm if you can find the corresponding SSID. If no...