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[gucci39]

Hello everyone, sorry if the topic isn't for here.
In a few weeks ago im getting problem with my WiFi via my smartphone. I have trouble with connection to my 2.4GHz, the problem is that I'm connecting "hard"
 to my router and if i am connected in few minutes my internet connection is going down. And i tried to enter in my router from my PC but i can't log in. I tried every password which I wrote on my list with usernames and passwords, also tried default user/password but unfortunately it didn't help me. I saw on internet how to reset the router to default settings. I held up the RESET button for 10+ seconds,  the first "lamp" on the router startedd to flash in orange color. Suddenly stop flashing and i did not have internet, reboot everything possible and I fixed it. Unfortunately I checked from my smartphone that my router names(2,4GHz and 5GHz) are same like before, I think i did not reset the router correctly. In other wi-fi connections I do not have problems with it. On my father's smartphone he is connecting without problem but he can't see the 5GHz "hotspot" unlike me. My previous router was TP-Link and i did not have problem with him, but when i changed my router I started to have problems with connections, unfortunateley as like I said I already cannot connect on my Wi-Fi, also in my router.

My smartphone is Lenovo K5 Note.

Please any suggestions ? 

[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?
• Has a Factory Reset been performed?

Internet Service Provider and Modem Configurations

• What ISP Service do you have? Cable or DSL?
• What ISP Modem Mfr. and model # do you have?
• Is ISP Modem/Service using Dynamic or Static WAN IP addressing?
• What ISP Modem service link speeds UP and Down do you have? Link> Speed Testing Sites

Router and Wired Configurations
Some things to try: - Log into the routers web page at 192.168.0.1. Use IE, Opera or FF to manage the router. Be sure to log into the Admin account on the router.

• Enable or Disable Use Unicasting (compatibility for some ISP DHCP Servers) and test under Setup/Internet/Manual. Disable may help with speed performance on higher speed ISP services.
• Turn on or off DNS Relay under Setup/Networking. Link>Finding Faster DNS Addresses using Name Bench and input new DNS addresses under Setup/Internet/Manual.
• Setup DHCP reserved IP addresses for all devices ON the router. Setup/Networking. This ensures each devices gets its own IP address when turned on and connected, eliminates IP address conflicts and helps in troubleshooting and maintain consistency for applications that need to connect as well as mapped drives.
• Ensure devices are set to auto obtain an IP address.
• If IPv6 is an option on the router, select Local Connection Only under Setup/IPv6.
• Set Firewall settings to Endpoint Independent for TCP and UDP under Advanced/Firewall. Enable or Disable SPI to test.
• Enable uPnP and Multi-cast Streaming under Advanced/Networking. Disable uPnP for testing Port Forwarding rules. Enable IPv6 Multi-cast Streaming for routers that have a Media Server option. Disable IPv6 Multi-cast Streaming if IPv6 or Media Server is not being used.
• Set current Time Zone, Date and Time. Use an NTP Server feature. The DST setting is only needed in the NA region. Tools/Time.

 
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.

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

[gucci39]

Im not sure about what exactly mean Firmware version but i'm from EU. I tried to perform reset the router but when I check my Wi-Fi networks again i had my two wi-fis with the same names like before and I can't log in into my router.

[FurryNutz]

Can you connect a wired LAN cable PC to the router and log in there? log in will be admin and password will be blank.

[reynov]

Thanks Mod.. This is what I need default username and password

[FurryNutz]

That information is also in the user manual as well.
 

Thanks Mod.. This is what I need default username and password

[gucci39]

Can you connect a wired LAN cable PC to the router and log in there? log in will be admin and password will be blank.

Everything is connected, did you mean that LAN cable pc to be connected in USB port ? I have connected cable for Internet/LAN.

[FurryNutz]

No the LAN cable from the PC to the LAN port on the router...

[gucci39]

No the LAN cable from the PC to the LAN port on the router...

Nothing work, or just Im not doing the things right. When I try to connect to my 2,4GHz or especially to 5GHz, i'm getting "problem with the certificate". If i have "luck" and successfully connect to my net it will slows down the connection till disappearance.

[FurryNutz]

I recommend that you phone contact your regional D-Link support office and ask for help and information regarding this. You may have a faulty unit. We find that phone contact has better immediate results over using email.
Let us know how it goes please.

[gucci39]

@FurryNutz

I fixed the problem with the password, but unfortunately my internet speed isn't fast. I think something isn't working properly, I mean that the speed of my internet via smartphone is terrible. It holds 100 B/s, after that 1,36 KB/s or something like that and suddenly turn down to 0 B/S and the speed being so slowly. I can't watch streams/videos or anything else because they cannot load at all. My ISP is Blizoo Media and broadband ead, Bulgaria. One friend told me that it could be problem from them.

Could they change any script on the router or something like that because we're paying for 200mb/s internet(the router is not bought from them)?
Also could they tell me the router's password because I do not have access to my router - forgot the password.

P.S I do not understand a lot about this stuff but could it be from the changing the service packages ?

[FurryNutz]

What ISP Modem Mfr. and model # do you have?