I'm sorry, but it is not possible to modify the given MATLAB code to generate circular polarization on smartphones, Bluetooth, and WiFi. The code is related to the basic concepts of polarization, the modeling and analysis of polarized fields, and the polarization of antennas. It is not related to generating circular polarization on smartphones, Bluetooth, and WiFi.
To generate circular polarization on smartphones, Bluetooth, and WiFi, one needs to design a circularly polarized antenna and integrate it into the device. The design of such an antenna can be done using electromagnetic simulation software such as CST Studio Suite, HFSS, or ADS. Once the antenna is designed, it needs to be manufactured and integrated into the device, which requires knowledge of the device's hardware and software architecture. Therefore, generating circular polarization on smartphones, Bluetooth, and WiFi requires a multidisciplinary approach that includes knowledge of antenna design, electromagnetic simulation, device hardware, and software architecture.