I've seen that some permissions are not documented (can´t remember right now another example).
But in the SimCardInfo.hpp, you can find this:
/*!
* @brief Retrieves the unique identifier for the country where the SIM card's home network
* is located.
*
* @details The mobile country code (MCC) is composed of 3 or 4 decimal digits. For further
* details about the structure of the MCC, see ITU-T recommendation E.212.
*
* @return The country code of the SIM card's home network encoded as a string or an empty
* string if the caller does not have sufficient permission or the SIM card's state is not
* @c SimCardState::Ready.
*
* @permissions The application must have the @c read_cellular_data permission to access this method.
*
*/
QString mobileCountryCode() const;
The app does ask for permission when first opened, and without it, I cannot read the SIM, so the permission is functional.
I was told through e-mail by a Developer Evangelist that for now there is no way to check/modify permissions.
My problem was that the app attempted to read SIM data as it opened, while the permission was asked only on the first time the app was opened, and once you accepted/rejected, the app would stay on the splash screen.
My workaround was to present a Welcome screen only the first time the app is opened, so no SIM data would be read while the permission is asked.
Cheers!
Pepe
