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[DWard]

I just bought my 890L in October.  I have a cable modem connected to a switch for wired ethernet throughout the house.  the 890L provides wireless connectivity for primarily iPads but also a new Amazon Echo.  Certain specific devices, including one iPad, my iPhone, and the Echo, have a very difficult time connecting.  Sometimes Speedtest tells me they get 30Mbps, but most of the time they get less than 1Mbps or, frankly, nothing.  Just these 3 devices (all relatively new, so this isn't about old hardware).  I have tried using QoS to "favor" these devices, and when I reboot they will usually work, but then in a day or two they cannot connect again.  I have tried taking all the "cards" out of Qos (since some forums suggest turning off QoS) but that doesn't help either.  I am at my wit's end and about to junk this router and buy a new one.  Any ideas before I waste $300?

[FurryNutz]

Link>Welcome!

• Link>What Firmware version is currently loaded? Found on the routers web page under status.
• What region are you located?
• is the 890L running in main Router or AP mode?

Internet Service Provider and Modem Configurations

• What ISP Service do you have? Cable or DSL?
• What ISP Modem Mfr. and model # do you have?

Wireless Configurations
Links>Wireless Installation Considerations and Managing Signal Congestion and Good Neighbour Policy

• Ensure the default (dlink) SSID name is changed. Ensure that different SSID names are used between each WiFi 2.4/5Ghz radios. Can be anything and not something that's already in use by any neighbouring WiFi routers. Under Setup/Wireless/Manual.
• What wireless modes are you using?
• For routers with Smart Connect Technology , try disabling this feature and test. Under Wireless.
• 2.4Ghz and 5Ghz routers: Try single mode G or N or mixed G and N on 2.4Ghz and single mode N or AC on 5Ghz?
• Channel Width set for Auto 20/40Mhz
• Try setting a manual Channel to a open or unused channel. 1, 6 or 11. 11 for single mode N if the channel is clear. 13 for EU regions. Try channel 48 or 149 on 5Ghz.
• What security mode are you using? Preferred security is WPA-Personal. WPA2/AES Only. Some WiFi adapters don't support AES, so you might want to try TPIK only or Auto TPIK and AES.
• What wireless devices do you have connected?
• Ensure any devices with WiFi adapter drivers are updated.
• Any 2.4Ghz or 5Ghz cordless house phones or WiFi APs near by that maybe causing interferences?
• Any other WiFi routers in the area that maybe causing interferences? Link> Use a WiFi Scanner to find out. How many?

Router Placement
Forum User - "Well I feel really dumb. After moving the router away from other electronic devices my speeds are back to normal. Just a heads up for anyone experiencing slow speeds, you might want to move it away from other electronics and see if that helps."
3-6' feet minimum safe distance between devices.
Placement on main level floor and central in the building and WELL ventilated is preferred. Not in basements or closets as building materials, or near by electronics devices could interfere or hinder good signal propagation.
http://www.smallnetbuilder.com/wireless/wireless-basics/31083-smallnetbuilders-wireless-faq-the-essentials
http://www.foxnews.com/tech/2015/10/27/how-to-get-stronger-wi-fi-signal.html?icid=maing-grid7|main5|dl31|sec1_lnk3%26pLid%3D1839803170
http://www.smallnetbuilder.com/wireless/wireless-features/32896-will-a-new-ac-router-bring-you-wifi-joy

[FurryNutz]

Any status on this? 

I just bought my 890L in October.  I have a cable modem connected to a switch for wired ethernet throughout the house.  the 890L provides wireless connectivity for primarily iPads but also a new Amazon Echo.  Certain specific devices, including one iPad, my iPhone, and the Echo, have a very difficult time connecting.  Sometimes Speedtest tells me they get 30Mbps, but most of the time they get less than 1Mbps or, frankly, nothing.  Just these 3 devices (all relatively new, so this isn't about old hardware).  I have tried using QoS to "favor" these devices, and when I reboot they will usually work, but then in a day or two they cannot connect again.  I have tried taking all the "cards" out of Qos (since some forums suggest turning off QoS) but that doesn't help either.  I am at my wit's end and about to junk this router and buy a new one.  Any ideas before I waste $300?