It’s not a mains router. It’s a portable, battery powered dongle. And my O2 SIM works in it fine so they’re not to blame. If my Virgin Broadband reached the end of my garden I wouldn’t need it
Same happened to me about 3 weeks ago. Got a new SIM today and the TP-Link still has no data. The SIM works on data in a phone. Guess Virgin have made it incompatible. Thanks for that. SIM going in the bin…