Ilya noted that using the example of Beeline you can see how this happened. Although only SIM 1 is assigned for data transfer in an Android smartphone, charges for “using” the Internet can occur even with a second SIM.
Shatilin summarized that when roaming it will now be necessary to physically turn off the phone and keep only local/tourist SIM cards. So, 100 KB on MegaFon costs 6.9 rubles.
This has already happened with Beeline and iPhone owners. Users reported that money was withdrawn from them when the Internet was turned off and there was no roaming call. It turned out that Beeline charges the so-called service traffic, which cannot be closed.
Source: Ferra
