I have a TP-Link TL-WR840N (which claims to be a b/g/n 300Mbps WiFi router) connected to Wimax modem and to a PC using one gigabit port. When I send or receive files from other devices (Android smartphones, tablets - all b/g/n) it gives me a terrible speed that never exceeds 1Mbps no matter the method used (FTP, SMB, or HTTP).
Is this normal? If not I will need to take it to the service center.