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The IOS17.2.1 system has been pushed in the early hours of this morning, and the version number is 21C66. At the same time, it is accompanied by the closure of the verification channel of iOS 17.1.1 and iOS 17.1.2 systems. Apple said that this release aims to respond to user needs and feedback, mainly to fix battery life and heating problems, and bring users a more stable and convenient mobile operation experience. I upgraded the 13, 14, and 15 series mobile phones as soon as possible, and after more than 10 hours of testing, I will give feedback on the performance of the preliminary test, and I will share the specific feedback results tomorrow. I hope it helps. The test is very hard, and it is not easy to share, I hope you can like, collect, forward and follow, thank you.
1. Signal performance: The upgraded signal is no different from the ios17.2 version system, and it is still unstable, up and down. Where there should be two bars of signal, the signal performance is lower than that of the ios17.1.2 system. The 13th and 14th series mobile phone signals are weakened after upgrading, and the 15 series mobile phone signals are the same as those of the iOS 17.2 system.
2. Endurance performance: After more than 10 hours of use, the system has basically been adapted, and the system is now stable. The battery life of the 15 series mobile phones has improved slightly, and there will be no battery life crash. The battery life of the 14 series mobile phones is basically the same as that of the iOS17.2 version of the system, but it still feels that the power is slightly faster, and the standby power is abnormal, and at the same time, it is found that there is a power jump problem, and the battery life performance is not as good as the iOS17.1.1 and iOS17.1.2 version systems. After the 13 series mobile phone is upgraded, the battery life performance is unstable, and there will also be power failure, depending on the battery health, there may be a significant drop in battery life.
3. Upgrade suggestions: 1, 13, 14 series mobile phones, if you are in ios17.2 version, you can try to upgrade, and the battery life will be slightly improved. 2. If you are currently in the iOS17.1, iOS17.1.1 and iOS17.1.2 version of the system, don't upgrade, there will be a decrease in battery life or battery life crash, and you can't downgrade back when you upgrade, because the system versions below iOS17.2 have all closed the verification channel, and it will be too late to regret it. Remember. 3. If you are in the iOS 17.2 version or below, choose to upgrade carefully according to your actual experience. If you are in the ios17.2 version system, you can rest assured to upgrade, after all, the ios17.2.1 system still has the solution to the ios17.2 version system problems.
Conclusion: Apple urgently released the ios17.2.1 system, mainly to fix the abnormal heating and battery life stability problems of the ios17.2 system, but the size of this version is only 207MB, which means that it has only been fine-tuned. As you can imagine, it won't make much of a difference. At present, the problems fixed in this version are not perfect, so don't expect too much. In addition, this is the result of my initial test experience, and does not represent the final result, and I will release the test experience tomorrow to share with you after the test night. You are also welcome to share your upgrade experience in the comment area below for everyone to discuss. Thank you.