A software bug can crash Apple devices if users receive a message containing a specific Unicode symbol. Unicode is a computer language that "provides a unique number for every character, no matter what platform, device, application or language."The glitch was discovered last week by Limassol, Cyprus-based online security company Aloha Browser.Apple's latest operating system update, iOS 11.25, contains a flaw that can cause iPhones, iPads, Macs and even Apple watches to shut down if users receive a message containing two Unicode characters from the Telegu alphabet, the third most-spoken language in India. Once the device crashes, its software may need to be reinstalled. This is the second "text bomb" to impact Apple devices this year. In January, chaiOS forced Apple devices to crash or restart when a user received a text with a specific URL through iMessage.The Cupertino-based company plans to release a patch to fix the error soon.