This article is written about UK networks, where none of the networks advertise data as being available at "2G speed". The only thing I can think of in the UK

This article is written about UK networks, where none of the networks advertise data as being available at "2G speed". The only thing I can think of in the UK that's similar is, the "Always On" offering from giffgaff, an MVNO (https://www.giffgaff.com/help/articles/what-does-always-on-mean https://www.giffgaff.com/help/articles/what-does-always-on-m...). It offers 80GB of data per month at full speeds, then unlimited data at 384kbps. The UK networks generally offer either a fixed data limit, or truly unlimited data plans.