The Bluetooth standard has evolved steadily over time, and remains one of the most useful wireless developments of the past 15 years. Wireless keyboards, headphones, our smartphones, and technologies like AirPlay and AirDrop all rely on the ever-changing Bluetooth standard. 

But things can and do go wrong: devices won’t pair, speakers don’t work, and files won’t transfer. Here’s what to try when you’re having Bluetooth problems.