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[nadim074]

i brought a d-link dir-816 router yesterday.
my oppo r7 plus did not find the 5ghz ssid.
i was 3 times reset router and again setup router but 2.5ghz ssid work fine.

[FurryNutz]

Link>Welcome!

• What Hardware version is your router? Look at sticker under the router case.
• Link>What Firmware version is currently loaded? Found on the routers web page under status.
• What region are you located?

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?
• 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 or try 20Mhz only.
• 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?
• If you have any of these options, Try turning OFF or ON Short GI, WLAN Partition, Extra Wireless Protection and HT 20/40 Co-existence if you have it. Also testing with HT20/40Mhz Co-existence enabled will impact results as well. I prefer to use this option OFF. Recommended settings are default. Under Advanced/Advanced Wireless.

[Hard Harry]

Do you have any other devices capable of connecting at 5Ghz? Can they see and connect to the network?

If so, it could be a issue with the fact that the Oppo r7 Plus is Wifi AC draft. Try setting the 5Ghz network to "802.11n Only" as seen on page 43 of manaul.

Also, just to confirm, is it a Oppo r7 or Oppo r7 PLUS? Main difference between the two is Wifi AC, which is the 5Ghz capability.

[RYAT3]

The OP did claim the plus, but I was lost after they said "2.5 Ghz". 

But they should check other devices as you suggest. Good suggestion.

They might also want to download WiFi Analyzer from the Android App Store.

[FurryNutz]

Any status on this? 

i brought a d-link dir-816 router yesterday.
my oppo r7 plus did not find the 5ghz ssid.
i was 3 times reset router and again setup router but 2.5ghz ssid work fine.