1, it is true, mobile phone positioning can rely on base station positioning, can also rely on GPS signal positioning, GPS positioning is achieved by positioning chip.
2. No, the IPHONE doesn't have that chip. But you can find my phone through ICLOUD to locate, the error is huge, the probability of finding is not large.
3, Yes. The positioning system is equipped with a positioning chip that has nothing to do with the satellite connection and SIM card. Or someone dropped their phone and they threw your cardh2>
1, it is entirely possible, the tracking chip is not GPS satellite positioning, it is positioning by communication, not afraid of ordinary shelter, it can also be used in indoor basement and other places.
2, no, the current GPS chip is not so small, and if you are in order to prevent loss also need to pass out the GPS position, which needs the support of the mobile network; You can put an IPHONE in your wallet and turn on the location function, but of course that's not realistic.
3, the bank card has the tracking and positioning function the bank card itself does not have the tracking and positioning function, because the bank card has no supply.
The real "China core", the chief designer of the Beidou system: beyond GPS, more powerful, more accurate At present, Beidou has taken the lead in creating three hybrid orbital constellations in the world. Compared with other systems, Beidou has added new functions such as accurate single point positioning, satellite-based enhancement, regional and global short message communication, and international search and rescue.
Therefore, the Beidou navigation chip can never be said to crush the imported chip, because from the chip point of view alone, the Beidou 22nm process is not absolutely strong.