@fire.power Check this setting:

@Snehi According to your screenshot in post #7 you're getting the same speed through the ethernet port of C6 as through its wireless connection. That means it shouldn't be a wireless settings problem...

@Lanski If you still have access to your router then make this change: If you don't have access to your router then reset - (Method 1) the device and re-configure it from scratch with wireless...

The problem may not be connected with your C6 router. Post that info: Can you connect the laptop by wire directly to your modem and make the test again ?

When connecting the laptop with a cable to the C6, what's the speed measured ?

@brainii While you are using the device in AP mode, which C6 port you're using to connect to your main router - yellow (LAN) or blue one (WAN/Internet) ? If you're using C6 yellow port then switch to...