Conceal your location via background effects

[seank]

u can while answering the incoming call u add a background fake sound (party..football match..concert.resturant.etc.)
which mobiles have this built in? saw it once on a imported chinese phone i cant remember...its quite cool

[smackjack]

hospital background to pull a prank on your mom ^^

[epimpao]

I dont get it it.