Why can't my headphones pair with the Nothing X app on iPhone after a factory reset?

Due to platform-related behavior on iOS, this issue can sometimes occur. Please try the following steps to resolve it: 1. Open the Settings app on your iPhone and go to the Bluetooth menu. 2. If the headphone device appears in the list of previously connected devices, tap the “i” icon next to it, then select “Forget This Device.” 3. Reopen the Nothing X app and follow the pairing process again.