Upgrading your JBL Xtreme firmware is the best way to resolve performance bugs, such as sound distortion, or to unlock new features like improved stereo pairing. Updates are handled "Over-the-Air" (OTA) using the JBL Portable App. Essential Update Checklist
Pro Tip: If your speaker feels "stuck" or won't update, try a factory reset by holding the Play and Volume Up (+) buttons simultaneously for a few seconds before trying the app again. Xtreme 4), or are you currently facing an error message? jbl xtreme update firmware
Bluetooth Proximity: Keep your phone within a few feet of the speaker during the entire process to prevent signal dropouts. Upgrading your JBL Xtreme firmware is the best