Apple officially launched iOS 27 on September 15, which supports iPhone 11 and later models, further improving daily operation speed. On the day the new system went live, many users reported “the new system is much smoother” on social media platforms, while others indicated that bugs such as “dropped frames” and “stuttering” occurred. On September 15, the reporter called Apple's official customer service as a consumer. When asking if the iPhone 11 could be upgraded, the customer service said that it is not recommended that old models such as the iPhone 11 and 12 be updated to iOS 27, and that the iPhone 13 and later models can be updated normally. According to customer service, there was feedback from users earlier that the iPhone 11 was unable to restart after installing iOS 27, and the phone had a black screen, and the compatibility and stability were insufficient. Apple customer service said that iOS 27 has just been launched, and all aspects may not be that stable. Users are advised to wait a while before deciding whether to update. “If you notice fluctuations in battery life after the update, or if you use fixed software, etc., you need to downgrade to 26.6.1, and you can call at any time to request a downgrade.”

Apple officially launched iOS 27 on September 15, which supports iPhone 11 and later models, further improving daily operation speed. On the day the new system went live, many users reported “the new system is much smoother” on social media platforms, while others indicated that bugs such as “dropped frames” and “stuttering” occurred. On September 15, the reporter called Apple's official customer service as a consumer. When asking if the iPhone 11 could be upgraded, the customer service said that it is not recommended that old models such as the iPhone 11 and 12 be updated to iOS 27, and that the iPhone 13 and later models can be updated normally. According to customer service, there was feedback from users earlier that the iPhone 11 was unable to restart after installing iOS 27, and the phone had a black screen, and the compatibility and stability were insufficient. Apple customer service said that iOS 27 has just been launched, and all aspects may not be that stable. Users are advised to wait a while before deciding whether to update. “If you notice fluctuations in battery life after the update, or if you use fixed software, etc., you need to downgrade to 26.6.1, and you can call at any time to request a downgrade.”