SIM Access Profile (SAP) This allows devices such as car phones with built in GSM transceivers to connect to a SIM card in a phone with Bluetooth, so the car phone itself doesn't require a separate SIM card.
從Wikipedia 找來的~ 你的手機當然要有支援 SAP 才能上傳SIM的資料給其他的設備。 這裡是例子是說有些房車可以透過GSM裝置和具此功能的藍牙手機做溝通來完成此功能。 如此一來,車子本身就可以不用另外一張SIM卡了,就可以完成通話的功能了。
Premature optimisation is the root of all evil in programming. - - C.A.R. Hoare.