Hello!    My Samsung Smart TV with info as shown in the attached photo can't connect to internet as I tried the followings already:-   - Reset cable modem & router. - Reset TV to factory setting. - Tried both wired and wireless connection.   - Can't try any software update as no internet connection no matter wired or wireless.   It used to be ok to have mirror casting from my Samsung S10 phone but now it doesn't work anymore either because of this.   I'm wondering if I need to buy another new modem router but my Samsung S10 phone can connect to the wifi without problem even though that it could be slow some times with my xfinity than my T-Mobile 4G.   Also no problem to connect my Win10 laptop and Apple iPad Pro from my router too.   That's why I puzzle what this "invalid MAC address" would be.   Any other suggestion to try please?     Thanks & Regards, Robert ... View more