My network selection was set to manual the instant I arrived in Corfu and Cosmote selected. On walking around a headland later in the week, I got a “Welcome to Albania” message followed almost immediately by a “Welcome to Greece message”. 20p was then added to my bill. I checked that my network selection wasn’t on automatic (it wasn’t) and changed my bill cap to zero. The same happened a number of times during my stay, but no further charges were added to my bill.
Why did I receive these messages at all and why was 20p added to my bill the first time?