@Joost_JP Hello, glad to hear that you've solved the problem now, just for records, may I know the ISP name of your SIM card?

@SneekPeek Hello, thanks for posting on the TP-Link Community. What is the model number and hardware version of your TP-Link range extender? Usually our range extenders support Smart DHCP and Static...

@Chazza234 Hi, you mean the signal LED off? if so, it means there is no wireless connection established, so the extender has disconnected from your main router now. Please verify if your main router...

@SpikeyWoo Yes, you are correct~

@Artem_ Hi, based on the screenshot, there is no Internet IPv4 address on the Advanced->Status page, since it was working fine before, I guess the ISP has changed something on their end. Please go to...

@Maheshkd Hello, we would like to escalate your case to the support engineers, and they will help follow it up, if you are willing to do further analysis, please check your email inbox and respond.