Apple have just rolled out version 8.4 of the iOS mobile operating system and the main headline feature that this came with is the Apple Music streaming-music service which came about due to their takeover of Beats by Dr. Dre.
But this version of iOS also fixes a bug that placed iPhones, iPads and iPod Touches at risk of crashing if a specially-formed message came in via iMessage or other message services. This was due to problems associated with handling standard ASCII and Unicode character combinations. To get their iOS devices back to life after a crash, they had to do things like ask correspondents to send pictures.
Any iOS user can update their devices either over the air by visiting the Settings screen then selecting “General” before clicking on “Software Update”. Or they could use the USB charge/data cable to plug the iDevice in to a regular computer equipped with iTunes and use that software to deliver the update to the device.