Wifi connected but no Internet in Android
4 Mar 2020
Turning on “Automatic Date & Time” under Settings > Date & Time in the OS may help. May then also need to turn Wifi off and on again.
Related ideas are provided at this web page.
Wi-Fi network saved but not connected in Android
More general ideas are provided at this web page.
Fix Android Connected to WiFi But No Internet
Update: 28 Oct 2022 - This may now be improved on Allegro 3 and Archer 3 with our latest OS patch 1.1.7
If an Archer 3 or Allegro 3 (A3) has Wifi connected but no Internet, please make sure that your 2.4 Ghz and 5 Ghz networks each have a separate SSID and not the same SSID, as well as verify that the A3 is connected to the 2.4 Ghz network only. Once OS update 1.0.6 or higher has been installed, this should help to prevent 5Ghz network interference.