I like the flex is better than the endurance set I purchased a few years ago. The flex connected easier than the endurance. But if you’re an active person. The endurance is less likely to fall out of your ears. They both have there ups and downs. The flex connects easier and faster.
I'm on my second set of these in a year. The right earphone has stopped working on both sets. With a fully charged case, it'll report 10% or 20%. I have cleaned out the connections both in the case and on the earphones themselves. When working properly they sound pretty good.
Response from jbl.comBy Customer Support, July 13, 2024
Thanks for bringing this to our attention. We'd like to work with you directly to address the issues you're experiencing with your JBL Tune Flex. If needed, we'd also like to get more information so we can check your options. Please contact our customer support service
Response from jbl.comBy Customer Support, June 23, 2024
Thanks for your feedback. Our JBL Tune Flex earbuds come with different sizes of ear tips to help you find the most comfortable fit and better sound quality. You can try mixing and matching them until you find the perfect fit. If you need more help with your JBL Tune Flex, please contact us.
The Bluetooth is very unreliable, headphones will just turn on and auto connect even when it's in the case. Also when they are put back into the case it won't turn off and it forces the person to go into the app just to turn them off.
Response from jbl.comBy Customer Support, June 14, 2024
Thank you for your feedback. We're here to help. Please make sure the charging case is clean and that nothing is preventing the headphones from sitting correctly and making good contact with the charging connectors. If that doesn't resolve the issue, you can do a factory reset. This can typically resolve glitches by restoring the original settings. With both earbuds on, and not charging, tap two times and hold the button on the third tap for more than 5 seconds. You may need to 'forget' the headphones in Bluetooth settings on your phone/tablet in order to pair it again. For further assistance, please contact customer support.
I bought these specially because they where advertised as having great microphone quality. i have used them in discord calls and phone calls, and the mic quality is subpar at best. I've had them 4 months, and am already experiencing issues with them having connection issues with the case, not registering insertion, or removal in/out of the case. I wanted to give them 2 stars, but I'm giving them the benefit of the doubt because the audio quality and battery life is very good.
Response from jbl.comBy Customer Support, June 12, 2024
Thank you for your feedback. We're here to help with your JBL Tune Flex. This issue can be caused by foreign matter on the earbuds or the charging case. These issues can be resolved by cleaning the earbuds and charging case. Please see the link below for the cleaning instructions that you can follow. If the issue remains, please contact our customer support so we can assist you. https://support.harmanaudio.com/us/en/howto/true-wireless-headphones-cleaning-instructions-for-re-establishing-charging-us/000016909.html