More and more smart phones are now advertising with NFC functions. NFC is Near Field Communication, which allows non-contact point to point data transmission between electronic devices to exchange data. Crystal Oscillator plays irreplaceable role in NFC mobile phone. The NFC in mobile phone has characteristic of two-way connection and recognition, working in 13.56MHz frequency range, and the function distance is about 10cm, this improves the security of transaction greatly. However, regardless of the development of NFC technology or other wireless communication technologies, hardware support is a key, the most critical factor in hardware is the frequency of crystal oscillator. It affects the use of the whole machine directly. We remind you to buy good quality China Crystal Oscillator with certification, to reduce the risk of the products quality.