Hi@Vertx,

Thank you for contacting our community.

EX220 is a customized device specifically designed for local Service Providers. Its software is tailored to meet the unique requirements of these providers, ensuring alignment with their specific needs. Due to the specialized nature of the firmware on your device, our ability to provide troubleshooting may be limited.

We can certainly offer some troubleshooting tips that may help resolve your issue. Please consider the following:

1). Login to the web interface of TP-Link router. Please refer to How do I log into the web-based Utility (Management Page) of TP-Link wireless router?

2). Please check whether the system time of TP-Link router is correct by going to Advanced -> System tools -> Time Settings. If necessary, please manually modify the NTP server in time Settings and Google the local NTP server in your own country.

3). Go to Advanced -> Network -> Internet, click on Advanced option in the middle of this page and change DNS server into 8.8.8.8 and 8.8.4.4.

If the problem persists after trying these steps, we recommend contacting the technical support of your Service Provider who supplied the device, as they are best suited to provide the necessary assistance for your device.