Even though there's a good chance that your head unit uses a much older version of Bluetooth than your phone, they should technically still work together in most circumstances. One notable exception is when one device uses something called "Bluetooth Smart," since these devices can only pair with devices that are Bluetooth Smart compatible. When your iPhone text tone is not working, you can check the settings and find out whether the text tone has been muted or not. Sometimes accidental touch or sliding on the device screen mutes it, and sometimes the iOS may go wrong, which leads to the change of the settings. How to Fix iPhone 8 and iPhone X Bluetooth Problems Posted by Gautam Prabhu on Dec 07, 2017 in iPhone Problems iPhone X has been voted as one of the 25 best inventions of 2017 , but like most iPhone models, it also comes with its own set of problems. Nov 11, 2016 · Wait for your iPhone or iPad to reboot. Swipe up from the bottom edge of the screen to bring up Control Center again. Tap the Bluetooth button to turn BT back on. Once your iPhone or iPad has rebooted, try connecting it in again. If it works, you're good. If not, go on to the next step. Headphones are electrical devices which sometimes we do not understand how or why they fluctuate in their performance especially when it comes to wireless (Bluetooth) headphones, so mostly the above basic troubleshooting steps should solve your headphone one side doesn’t work issue but if it did not, then proceed to the advanced steps.