OTA stands for "over-the-air" and refers to the wireless delivery of new software, firmware, or other data to mobile devices. OTA updates are designed to upgrade the underlying operating system, the read-only apps installed on the system partition, and/or time zone rules. OTA updates are a more efficient way for OEMs to fix bugs and update software than to manually upgrade each individual device. OTA updates can catch issues before devices launch, which can save OEMs time and money, as well as reduce the software development and quality-assurance (QA) process. OTA updates also enable OEMs to update software more easily on devices that are difficult to access. OTA technology has grown more prominent with the growth of mobile devices and applications. Mobile operators and telecommunication third parties can send OTA updates through SMS to configure data updates in SIM cards, distribute system updates, or access services such as wireless access protocol (WAP) or multimedia messaging service (MMS) . OTA updates also enable mobile operators to activate user subscriptions. In addition, OTA allows installation of new features, providing more functionality from the developers of the product. OTA updates are a huge factor in the growing success of IoT and the proliferation of consumer devices around the world.