It has been 20 days since Apple released iOS 17.2.1 on December 20. Our four mobile phones, 13pm, 14pm, 15 basic, and 15pro, have been using this system. At the moment, the system is stable, and we have been using it for a long time, so the results of the test will be more accurate. Next, we will focus on the measurement and analysis from the two aspects of battery life and signal, hoping to help small partners in need.
Due to the differences in the physique, use environment, application software, battery health and other conditions of each mobile phone, it may lead to different experience effects for individual users after upgrading. I sincerely hope that you can tell you your experience in the comment area below, and we will communicate with each other. Thank you.
In terms of battery life: 1, 13 series mobile phones are upgraded to ios17.2.1 version system, and the battery life is about 5% lower than ios17.1 series version system, and about 4% lower than ios17.2 version system, and the decline of 13pro series mobile phones will be a little smaller, about 2%. 2. The 14 series mobile phones are upgraded to the iOS17.2.1 version system, and the battery life is about 2% lower than the iOS17.1 series version, and about 1% compared with the iOS17.2 version system. 3. The 15 series mobile phones are upgraded to the iOS17.2.1 version system, and the battery life is about 1% higher than the iOS17.1 series version system, and the increase is about 2% compared with the iOS17.2 version system. This shows that after upgrading the iOS17.2.1 system, the battery life of the 13 series mobile phones will decrease, the battery life of the 14 series mobile phones will also decrease, but the decline will be smaller, and the battery life of the 15 series mobile phones will be improved to varying degrees.
Signal performance: After upgrading to the ios17.2 version of the system, the signal of the 13, 14, and 15 series mobile phones has decreased compared with the previous versions of the system, and the perception is obvious. The signal of the 13 series mobile phone decreases, but there is no problem in normal use; the signal of the 14 series mobile phone decreases, and when making normal calls, there are occasional intermittent and inaudible calls, and sometimes the network speed slows down; the signal of the 15 series mobile phone decreases, and occasionally there is a situation where the call cannot be made normally and the data network is suddenly cut off.
Other problems: (1) The problem of Wi-Fi disconnection appears frequently again in the iOS 17.2.1 system. (2) The battery is power-out, such as when the video is shabu-shabu, and the power will suddenly drop from 80% to 78%. (3) 14 series mobile phones, in some cases, there will be abnormal heating, resulting in abnormal battery consumption.