Solved
London underground wifi
Every-time i try to log into Three WiFi on London underground, I always get a message “ Please Insert a valid USIM card? Any help would be appreciated
Marquerita TAnswer
iD Mobile Employee
Aug 17, 2026 3:18 PM UTC
Hi
Thank you for your post.
Just to clarify, iD Mobile customers can’t access the station Wi-Fi networks (like THREE_WIFI) that Three or Vodafone offer on the London Underground. Even though we use Three’s network, that Wi-Fi perk doesn’t extend to MVNO customers like ours.
The good news is, your iD Mobile SIM will automatically connect to 4G and 5G mobile data in the underground stations and tunnels where coverage is available.
Hope that clears things up.
Thanks,
Marquerita
The iD Mobile Team
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