The Lom people of the Mapur Bangka tribe of Bangka Belitung Province are unique communities that still hold on firmly to ancestral beliefs. The elements of their trust became their source of the way of life.

This research was an ethnographic study with a religious anthropology approach that refers to ethical theory. Data retrieval was done by observing and in-depth interviews with vital information, such as the Customary Chairperson, customary leaders, and Lom communities. Data collection was carried out in the Lom Mapur residential area such as Air Abik, Mapur, and Pejem in Bangka regency, Bangka Belitung province.

The finding of the study indicated that Lom people continued to survive with the old belief system that they had practiced. Their form of belief showed to be animism and is identical to fetishism (paganism). They used an ambivalent strategy between ownership of formal citizenship identity and trust identity as adherents of local religions in Indonesia. They had the fundamental concepts, namely cosmology. For them, life did not have to adopt a formal religion. Faith does not determine the happiness of life, but a clean heart determines life.