@terziyski 

Thanks for tour answer, so I contacted my ISP who provided the router

A technician came to my place, and he could access the router without any problem with his laptop after keying in UN + Password .....

Nothing worked with my laptop (3 different browsers - cable or wifi) and/or my smartphone only my password is requested and not the pair "UN/password" .....

The technician told me he never saw that and that the only possibility was the difference of language configuration between the router and my laptop  (Malaysian ISP, French Windows and Android). How can this be possible ? any clue please ? if it might be possible what kind of solutions would you recommend please ...

This cant be possible since 2 weeks ago i could do it 1 km away from where I am now with my hardware and with another router (same ISP) using this ISP internet

The technician signed his report after stating that it was not the ISP reasonability ......

@jpkan 

Hi,

When the technician opened the login page of your router on his laptop computer, did it look the same as when you open it on your laptop, with the only difference being the missing entry field for the Username?

Or does the login page look completely different if you open it on your laptop?

Can you maybe post a screenshot of the router's login page here?

@woozle 

woozle wrote

@jpkan 

 

Hi,

 

When the technician opened the login page of your router on his laptop computer, did it look the same as when you open it on your laptop, with the only difference being the missing entry field for the Username?

 

Or does the login page look completely different if you open it on your laptop?

 

Can you maybe post a screenshot of the router's login page here?

 

Thanks woozle

Yes when the technician opened the login page of my router on his laptop computer, it look the same as when I open it on my laptop, with the only difference being the missing entry field for the Username .... He had both UN and password fields .....

I'll post a screenshot as soon as I know how to do it !!!

@woozle 

this is the page (TIME being the local ISP I'm using) you have asked me

@terziyski 

No I dont have this "tp link ID"
thanks

@jpkan 

I couldn't find a user manual for your AC2600/EC440-G5u model online, but I did find one for the model AC2600/EC440-G4u, which I guess should be similar. The EC440-G4u model's user interface is indeed the type that only requires a password for the login, no username. So, I think what you are seeing makes sense.

Is there a chance that the technician actually logged-in to another device when he was asked for a username and password, maybe a modem router that the AC2600's WAN port is connected to?

By the way, according to information on the Internet, the passwords for routers that are supplied by the ISP TIME are apparently in the format "TIME****", with the four stars being the last four digits of the router's MAC address. For example, if the MAC address printed on the label on the underside of the router was "11-22-33-44-55-66", then the router's password should be "TIME5566". (without the quotes)

@woozle 

Many thanks for your time !

1-The technician logged in MY router and this kind of router really needs both UN + Password

2-Yes you are right for the password, of course i've used the default password after reseting the router but it doesn't work even after changing my windows keyboard from French to US English (as they use here in Malaysia)

3-I have 3 PCs (French Windows 10 OS) + 2 phones (French Android), it does not work with any of those  ........ BUT .... yesterday evening I tried with 2 local computers from local friends (one W10 OS + one Ipad) and it worked ..... UN and Password are requested and I could access the parameters of the router without any problem (just like the local technician) ...

So would do you think about that ? I really want to access the routers parameters by myself when I want .....

thanks again !