Over-The-Air (OTA) is a common concept that enables you to distribute various things, like a piece of code, to a device without physical access. In the context of mobile networks and SIM cards, OTA technology enables mobile network operators (MNOs) or MVNOs to change or update data in SIM cards deployed and get service without reissuing them! So, it means through remote provisioning, OTA reduces the cost of manual configuration not only for carriers but also for subscribers.