Apple released the latest beta version of iOS 12.1.3 beta4, which was released from the previous beta3 release on January 8. The time was only 3 days apart. According to past practice, the test version is Frequent pushed, indicating that the official version of iOS 12.1.3 will be released soon.
From the previous iOS12.1.3 beta3 version experience, the fluency has improved, and more importantly, Apple has finally begun to optimize for the problem of high power consumption, and the battery life has also been significantly improved.
This update is still a minor version update only 200MB in size, Apple in the description, only to fix the problem, improve stability, so did not add any new features.
The recent release of iOS12 version review