1. Before I was 12.3. Now upgraded the latest 15.1, after a few days of upgrade experience fever reduced a lot, before playing the game less than a while the phone is hot now after the upgrade the phone does not feel hot.
2. Talk about the power problem in fact, the difference is not big. Sometimes it feels like it is still a little bit less than before, after all, the phone is not hot.
3. The problem of caton has not been encountered, sometimes there is an obvious meal when sliding when using the software to switch, and the feeling is not obvious, except for those with obsessive-compulsive disorder. .
4. The battery health does not have any impact, everything is much smoother, and the Wi-Fi signal is much better than before.
Conclusion: If your current version is relatively low and want to upgrade, I think it can still be upgraded.
Update 15.2 system is not recommended for iPhone XS Max. Because this phone has undergone several years of grinding, his chips and systems have been unable to withstand the stability of the 15.2 system. If you enjoy the upgrade of 15.2 system, it will cause the load of the mobile phone. The mobile phone may have a shortage of fever and actual situation. I hope what I said can be helpful to you.