Series 30+

Series 30+ (abbreviated as S30+) is a software platform and application user interface used for some Nokia-branded and HMD-branded mobile phones. It is the main software used for Nokia feature phones succeeding Series 30 and Series 40. Earlier Series 30+ devices following its inception in 2013 use MediaTek chips and are based on MAUI software, while most devices since 2020 (including all 4G phones) are developed on Unisoc chips and run the Series 30+ interface on top of Mocor RTOS.