British telco Three UK has once again let random people viewing its homepage view its customers' account details as if they were logged in, exposing personal and billing data to casual browsing.
Several Reg readers got in touch with us on Friday afternoon and Saturday after noticing that when visiting Three's website, they appeared to be logged into accounts that were not their own.
Hotspotted on to Three with phone and laptop.
El Reg has been shown recent screenshots of the CK Hutchison Holdings subsidiary's website displaying various people's names and access to the "My3 Home" area.
That login-protected part of the website contains one's personal details and billing information.
Yet another customer took to Twitter to complain about the issue: