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вЂ“ A stable bluetooth connection between the JBL Pulse 2 and the device from which the firmware upgrade will be performed.

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Firmware upgrade will be performed via JBL Connect app which can be downloaded via Play Store on Android or App Store on IOS.

вЂ“ An Android or Apple phone / tablet with bluetooth, reliable internet connection and a fully charged battery.

The вЂњHigh PerformanceвЂќ power plan should be selected in the power options, ensuring that the computer will not go to sleep during the firmware upgrade and therefore disconnect power to the JBL Pulse 2.

If you intend to use a laptop for charging the JBL Pulse 2 during the firmware upgrade, make sure its battery is sufficiently charged and will hold for at least 1 hour. JBL Pulse 2 needs to be connected to a power source during the firmware upgrade, even if itвЂ™s fully charged.

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вЂ“ A charging adapter suitable for JBL Pulse 2 or a charging micro-usb cable and computer with a free USB port.

вЂ“ A JBL Pulse 2 speaker with a fully charged battery.

Items required to perform a firmware upgrade on a JBL Pulse 2: *Author of this post is in no way responsible for any damage that could occur by not following the exact steps below. Go through all the steps below carefully before attempting the firmware upgrade. Taking shortcuts or not following the exact steps can result in a failed firmware upgrade which could render the speaker unresponsive. JBL Pulse 2 firmware upgrade procedureДЇirmware upgrade on a JBL Pulse 2 is a simple and risk free procedure if itвЂ™s performed correctly. After upgrading the firmware, his JBL Pulse 2 now works without issues.

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Update: One of the visitors has notified me that his JBL Pulse 2 is exhibiting same problems as described above, but in his case the reason for the interference was an Apple TV (4th generation). Before attempting the firmware upgrade, it is important to remove the JBL Pulse 2 from the environment in which the mentioned bluetooth interference occurs, otherwise there is a risk of the firmware upgrade failing, which could render the speaker unusable.

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Samsung Series 5 Smart TV interfering with JBL Pulse 2ДЇortunately, JBL has rectified the susceptibility to bluetooth interference from the Samsung Smart TV Series 5 in the form of a firmware upgrade. I tried playing some music вЂ“ it was working perfectly and without any stutter, the bluetooth connection was rock solid. I then tried to pair the speaker to my phone вЂ“ the pairing process completed successfully and JBL Pulse 2 has finally connected to my phone. Only when I have reached the distance of approximately 200 meters (650 feet) from the nearest building, the Samsung Smart TV disappeared and light-show on the JBL Pulse 2 stopped. While the distance between me and the nearest building was around 100 meters (330 feet), the Samsung Smart TV was still under available devices in the phonesвЂ™ bluetooth settings and JBL Pulse 2 was still flashing LEDs like a Christmas tree. So I went, with my phone in one hand and JBL Pulse 2 in the other. The next best option, apart from going door to door and kindly asking every resident in the building if they posses the mentioned Samsung Smart TV and would be willing to turn it off, was taking the speaker as far away from this potential interference as possible. The issue was I couldnвЂ™t turn it off, to confirm my hypothesis, since I didnвЂ™t have access to it. Unfortunately the issue was still present.ДЄfter searching for other nearby bluetooth devices that could possibly interfere with the JBL Pulse 2, one particular device seem to be present in the bluetooth settings on every search вЂ“ a Samsung Smart TV (Series 5). I started the process of elimination by turning off all of the nearby bluetooth devices one by one and in the end, even the wireless router. This has lead me to the conclusion that there is some interference coming from a nearby device that uses the same radio frequency for communication. While investigating the issue further, I have noticed that the fault is less apparent when the speaker is held in hand. Upon discovering that the issue is still present after the speaker re-assembly, I was puzzled. When I have first encountered the above mentioned behaviour on a JBL Pulse 2 speaker, my first thought was that the flex cable, connecting the button control board to the main board, wasnвЂ™t fully seated in the connector, during the speaker assembly. If you would like to skip the details and go straight to the JBL Pulse 2 firmware upgrade procedure click here.