I understand your concern. In Jain Dharma, the guiding principle inside a derasar is maryada (proper conduct) and apramattata (non‑negligence). That is why:

• Phones: Traditionally, phones should be switched off and not used in the temple. Many derasars either prohibit them or require full silent mode. Any ringing, photography, chatting, or scrolling during darshan/puja breaks maryada and disturbs others. If a committee “allows” carrying a phone, it is only as a practical concession (e.g., emergencies or seva coordination) and never for use inside the sanctum or during worship.

• Shorts: Generally not allowed. Dress should be simple and modest, covering at least the knees and shoulders. This maintains shuchi (cleanliness/purity) and vinay (reverent humility) before the Jina. Flashy or revealing attire distracts oneself and others from bhakti.

Sect notes:

• Shvetambar (especially Murtipujak): Prefer simple/white, clean clothes; silence; no phone use; modest dress is expected.
• Digambar: Very strict decorum; men may be asked to remove the upper garment near the garbhagriha; phones are out of place; modest dress is expected for everyone.

Bottom line: Phones are not for use in the temple, and shorts don’t fit Jain temple maryada. Always follow your local derasar’s posted rules and the pujari/committee’s instructions.

For a simple checklist of temple etiquette, see: