What's the use of the white stripes on the back of iPhone?

For iPhone6/6s mobile phone users, I believe many users have noticed a white line behind Apple 6, and I believe many people have searched for the function and usage of the white line. In fact, the white line behind Apple's mobile phone is very useful in design. If there is no plastic white wire on the mobile phone, the mobile phone may not receive the signal, so we can link the plastic white wire to? Antenna? ! What was not mentioned at the press conference of iPhone6 at that time was that iPhone6 was owned by the previous generation iPhone. Quan netcom? (iPhone6 Cellular Open Edition supports China Mobile/Unicom/Telecom 2G/3G/4G), also supports 802. 1 1a/b/g/n/ac wireless network (single antenna, dual frequency 2.4GHz/5GHz) and Bluetooth 4.0, and has joined NFC. This makes the antenna design of iPhone6 more complicated than before. Here GeekBar reveals the antenna design secret of iPhone6. 1: First of all, we spit out the split design on the back. The seemingly integrated metal back shell, filled with plastic, is actually divided into three sections: A/BCD/E. A and E are the upper antenna and the lower antenna respectively, and the BCD part in the middle is connected with each other and acts as the antenna grounding part. 2. The upper antenna of 2.iPhone 6 involves cellular antenna, dual-band WLAN, Bluetooth, GPS, NFC and other functions. Antenna feed port (front) on the main board of iPhone6 The antenna on the main board of iPhone6 includes 1 feed ports of UAT65438, UAT2 and UAT3, and two NFC ports. UAT 1 is the antenna tuning port, which affects UAT3UAT2 is the WLAN 5GHz band antenna; UAT3 has many functions, including WLAN2.4GHz, Bluetooth, GPS and cellular antenna. IPhone6 schematic 5GHz WIFI antenna feed port The lower part of the iPhone 6 antenna involves a cellular main antenna. As a mobile terminal device, a mobile phone must be connected to the network to make sense. Wireless networks in different frequency bands are carried on radio waves in different frequency bands. If a receiving antenna is used, it will affect each other's work. It can be seen that when Apple designed the iPhone, it considered that the antenna (leucorrhea) designed under the premise of ensuring the signal quality was a last resort. Through the above method, we can't see the hardware in the white plastic, but on the other hand, we all know that metal objects will cause great obstacles to the signal. To make the obstacle smaller, only through this alternating design can the conflict between the metal fuselage and the antenna be avoided!