Hi, thankyou, Last firmware intalled.... I tried different device and it works, so is a problem in TP setup. I contacted the support but they do not answer back... :( Still have the issue

Hello, We have a TL-MR6400 to use a 4G connection with sim card. We can not establish a connection with skype for buisiness. Access to Internet is good and there are no others issues. With the same...