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It works on mine since Fobilicious (2.50.114?) - a couple FW updates ago. It didn't work until sometime in December, but it does now, if your firmware is current and it's enabled on the center screen.
Mike, it works on mine.
I applied Ver 8.0 (2.50.114) 22 Dec and it activated the fob SUMMON commands.
On 13 Jan I loaded 8.0 (2.52.22) that returned the driver set over/under for the speed limit.
What software version are you on? (Touch the Tesla sign on the touchscreen to find out from the poppup screen.)
Sounds like you are on an earlier version.