The number of sim cards supported by a device. For the purposes of this capability, we include SIM cards with standby functions (DSDS) as well.
For example if a device has 1 dedicated sim card slot and a hybrid micro sd/sim card slot, this capability will return `2`. If a device has one dedicated sim card slot and one e-sim support, and only one can be used at a time(Eg. Google Pixel 2), we will return `2`. For devices that support a sim-less communications technology (eg. older CDMA, eSIM), we return `1`. If a device has no sim capabilities, we will return `0`.