Read this article to get some hints. http://www.tp-link.com/en/article/?faqid=788

What's the working mode of MR3020? Ensure it is 3G/4G. Connect PC to its LAN/WAN port and disable Wi-Fi on your PC. Check IP address and default gateway obtained for local area connection. If the...

Claus, you didn't read highlights for MR3040, did you? *4G LTE Modems Compatibility apply to TL-MR3040 Version 1.0 and Version 2.0 both. However, for TL-MR3040_V1, only firmware TL-MR3040_V1_120822...

Looking to hear from you soon and good luck. ;)

TD-W8961ND V2 is not new anymore. If you need to connect more clients, look for some new models. Compared with V2, W8961ND V3 will do a better job.

There is a possible solution but you have to change security settings on the router. Secure the network with WEP, remove the network profile on Vista and reconnect....