someone who makes a telephone call pretending to be someone they are not, or saying something that is not true, usually as a joke

No longer will a prank caller from a cell phone be able to remain anonymous. 用手机拨打恶作剧电话的人不再能够保持匿名。

If I ring to complain they hang up, assuming I'm a prank caller. 如果我打电话投诉，他们就会挂断，认为我是打恶作剧电话的。