I need a simple embedded device or IoT device for tele communication.

Device Hardware with : eSIM module or embedded traditional SIM card ( traditional SIM card not useable on mobile after use ) Wireless headphone module, Wired headphone jack, Nokia BL5C BL-5C 1020 mAh Battery, Mini small number keyboard like watch, Number display like Calculator or watch, Smaller then 5cm x 5cm x 2cm and lightweight chassis, Simple free Operating system such as FreeRTOS or Zephyr, Microcontrollers or Microprocessors or other cost comfortable , Charging port for c type pin purposes : Calling application is required to make and receive calls. Connect with wired or wiless headphone Charge and showing charge set Pin and change pin and required pin befor call can use jio modem baord