Apple previously said that a “small percentage” of units manufactured before October 2020 may be affected by the issue. The program covers buds exhibiting cracking or static sounds in loud environments, or while the user is exercising or talking on the phone. It also covers units with faulty Active Noise Cancellation that show irregularities, such as the loss of bass or an increase in background sounds. According to a few commenters on the Reddit post, however, even their buds that were manufactured later than October 2020 were exhibiting sound issues. While those models are technically not covered by the program anymore, the users were still able to get them replaced by getting in touch with Apple.
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