I prefer a standalone PLB (personal locator beacon) when backcountry skiing. Smaller, lighter, more reliable, no subscription fee.
The downside is there is basically nothing other than "I need rescue" that you can do with the device. You turn it on and a rescue team shows up.
Most SAR teams are not dedicated to SAR, but do other tasks (firefighting, soldiering, etc) so SAR operations kinda fall under training.