The phrase is the standard Tamil equivalent of the busy-on-another-call message used by Indian mobile networks, with 91 being India's country code. The Tamil wording, Neengal alaithirukum nabar veru oruvarudan pesi kondu irukirar, is heard by callers across Tamil Nadu when a number is engaged. Clips of the announcement later circulated as shareable audios on WhatsApp and soundboards, where users play it to friends instead of letting a real call connect, turning an everyday network prompt into a small, recognisable phone prank.