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Definition: KaiOS


A Linux mobile phone OS with a fixed set of functions from Hong Kong-based KaiOS Technologies. Introduced in 2017, KaiOS is a 4G cellphone version of the Firefox OS. Supported by more than two dozen phone vendors, some of which make a KaiOS app store available to their users. Devices are extremely inexpensive compared to high-end iPhones and Androids. See feature phone.




A Nokia KaiOS-Based Phone
The Nokia 6300 is a 4G dual SIM cellphone with social apps, Google Maps and Google Assistant. Retailing on Amazon for less than $70 in 2023, KaiOS enables vendors to make very affordable devices. (Image courtesy of Amazon.com.)