Pcb: Nai Nai on Instagram: "Each device includes 20 mobile phones + free group control software. Our device's biggest advantage is that we possess the entire mobile phone system source code, allowing us to use low-level system compilation to solve all risk control issues. It has a built-in virtual SIM card with configurable ICCID, IMSI, MCC, MNC, and PhoneNumber, and the SIM information is globally accessible to both the system and applications. This increases the weight for apps that detect SIM