I have a Samsung Galaxy S Duos 2 (GT-S7582) with two SIMs. I'd like to use one of those SIMs for everything telephony related, the other SIM for everything data related. I managed to set the first card to be the default SIM for outgoing calls, and I deleted the APN for the first card so that only the second SIM is used for data.
However, I still receive calls for the number of the second SIM. I also get the choice to call using the second SIM, which I do not want.
How can I disable receiving calls from the second SIM? How can I fix telephony/data even harder to the individual SIMs?
Android version: 4.2.2
EDIT: As a first workaround, I disabled the default ringtone for the second SIM. This way only the display lights up, which is easy to ignore.