I will comment something...
1) Delight App v1.5 or v1.5.1 already contains ConTest module, so if anyone have the former, you do not need to download ConTest.
2) For Belle Refresh and earlier, I would say this improvement is optional. There, you can once and for always add a WiFi access point manually and put it in the Internet category.
3) The first server is "mine". Mine in quotes, because it is the original Nokia's intact config.
4) The second server belongs to Andrei. He modified the original config so that it tells your phone to maintain connection. This variant is not power-efficiant though.
5) Additional server -
https://allnokia.ru/nokiabelle-testwlan/Use it as the last scenario, because it will prompt you an empty login page each time you connect (on account of HTTPS protocol).
6) It is also possible to get rid of the Limited connectivity errors on FP2 completely. For these purposes, expel wlanmaintenance.exe and zero out all values in 10282ec7.txt
After that, add a WiFi access point manually and put it in the Internet category. Limited connectivity will now permanently appear, but it does not affect the functional, just the name may be misgiven...