[bbc] A code of ethics for the use of mobile phones has been launched by Egypt's official telecoms regulatory body.
The 16-point guide includes advice about when to switch phones off and warns against annoying others with ringtones and loud conversations.
Mobile phone technology is "considered one of the greatest technologies (to) emerge in the last few years to serve humanity," it says.
But it should not be used to "annoy or tease" others, the guide continues.
The code was prepared by the country's National Telecom Regulatory Authority and the Consumer Rights Protection Committee.
"This Ethics Code aims to regulate the users' behaviours on using mobile phones especially with the increasing and intense problems and irresponsible behaviour of some users of mobile technology," reads the introduction.
Egypt seeks ethical mobile users