How to replace 2017 FOB with something smaller like a smart card?

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2017 Mazda 3 Hatchback Grand Touring
I have been able to combine cell phone and wallet with a nice slim cardholder phone case. It is so convenient. To use my building access card I just hold up my phone case to the sensor.

Now I am getting annoyed at having to carry this big old FOB around.

Is there a way to program a card-sized remote to work with my 2017 Mazda 3?
 

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