Best idea: NFC chips built into the phone
If the NFC chip is built in the mobile phone, it can be matched with various apps that support NFC functions. At this time, the mobile phone can not only use electronic credentials as an NFC sensor label, but also an NFC card reader, which can read other NFCtags or transmit data with other NFC devices. Take the solution provided by the electronic lock manufacturer as an example, the NFC mobile phone with the manufacturer's APP, after authorization, can open the electronic lock that supports the NFC, rather than having another card or metal key.
Medium solution: Use NFC-SIM card directly
If you want to use your mobile phone as a tag to get access to mobile payments and customs clearance, you can find a telecom provider to replace the SWP-SIM card and download an APP provided by a telecom or banking provider. The NFC chip in the mobile phone will provide RF signals and forward data to the SIM card, and the SIM card can use the SWP(SingleWire Connection Protocol) interface to connect to the NFC chip, and ensure data security through the TSM(Trust Service Management Platform) provided by the telecom company. China Mobile has also allowed users to replace SIM cards for use.
Bad idea: Load MicroSD with NFC function
Insert a MicroSD memory card supporting NFC into the mobile phone, and with the APP provided by the industry, the mobile phone can be used as a tag, and the access control or one-card data can be loaded in the MicroSD with NFC communication function in advance, and can be used when inserted into the smart phone. In fact, as long as the mobile phone can be used as the NFCtag, it can be used as the key to start access control, therefore, the access control equipment manufacturers are focusing on, and even have completed the NFC access control system solution, this stage also appears for the equipment manufacturers to design NFC modular solution SI, and provide a complete SDK, APP software, to assist equipment manufacturers to accelerate the development of products, Enter the mobile access control market.
NFC chip is an important part of NFC technology, which has communication function and certain computing power, and some NFC chip products even contain encryption logic circuits and encryption\/decryption modules. At present, the development of NFC chips began to get on track, in addition to NXP, which has been working in the field of NFC chips, more and more manufacturers began to join the ranks of NFC chip production, stmicroelectronics, Broadcom, Infineon, Renesas, Samsung, Qualcomm, etc., have joined the ranks of NFC chip production. The NFC chips they produce are used in a variety of mobile devices, and NFC chips and NFC technology are getting more and more attention from users.