I solved problem. I rebooted few times router and few times restored factory defaults and it fixed.

Yes, I am getting the expected speeds when I connect a computer directly to the cable modem.

I did all that you recommended, even my provider gave me new cable modem, but there is still same problem. Also I contacted tech support but they are on vacation due Chinese New Year. I am very...

Region : Others Model : TL-WR740N Hardware Version : V4.20.0 Firmware Version : ISP : Hello, I bought today new TP-Link TL-WR740N and I connected it with my cable modem as it is in manual instructed....