iOS 17.2.1 official version released: What's new and is it worth upgrading?

Apple has been internally testing the iOS 17.2.1 system update for iPhone. It was initially expected that the update might be delayed until January next year. However, surprisingly, Apple pushed the iOS 17.2.1 update to iPhone users today.

##The internal version number of the official version of iOS 17.2.1 is 21C66 , 14 days since the last release. As predicted in the early stage, this official version of iOS 17.2.1 is indeed only a small transitional update, mainly used to fix some errors and security vulnerabilities and pave the way for the upcoming iOS 17.3.

Regarding the update content of the official version of iOS 17.2.1, Apple’s update log introduces it like this: This update contains important bug fixes and solves some problems in some cases. Due to the problem of battery draining out faster than expected, it is recommended for all users to install. It should be noted that due to cache issues with node server configurations in Apple's various regions, there may be a slight delay in detecting upgrade updates in some places, but it will not be too long.

Apple iOS 17.2.1 official version upgrade method:

Open the PC (needs to be updated to the latest version) and connect the iOS device to the computer. On the "One-click flashing" page, select iOS 17.2.1, check the "Keep user data flashing" option, click "Flash now" and wait patiently for the flashing to complete.

##Attached is iOS 17 release history:

2023- 12-13: iOS 17.3 Beta (21D5026f)

2023-12-06: iOS 17.2 Release Candidate (21C62)

2023-12-01: iOS 17.1.2 (21B101)

2023-11-29：iOS 17.2 Beta 4 (21C5054b)

2023-11-15：iOS 17.2 Beta 3 (21C5046c)

2023-11-10：iOS 17.2 Beta 2 (21C5040g)

2023-11-08：iOS 17.1.1 (21B91)

2023-10-27：iOS 17.2 Beta (21C5029g)

2023- 10-18：iOS 17.1 Release Candiate (21B74)

2023-10-11：iOS 17.1 Beta 3 (21B5066a)

2023-10-05：iOS 17.0.3 (21A360)

2023-10-04：iOS 17.1 Beta 2 (21B5056e)

2023-09-28：iOS 17.1 Beta (21B5045h)

2023-09-23：iOS 17.0 .2 (21A350)

2023-09-22：iOS 17.0.1 (21A340)

2023-09-13：iOS 17 Release Candidate (21A329)

2023 -08-30: iOS 17 Beta 8 (21A5326a)

2023-08-23: iOS 17 Beta 7 (21A5319a)

2023-08-16: iOS 17 Beta 6 (21A5312c)

2023-08-09：iOS 17 Beta 5 (21A5303d)

2023-07-26：iOS 17 Beta 4 (21A5291h)

2023-07-06： iOS 17 Beta 3 (21A5277h)

2023-06-22：iOS 17 Beta 2 (21A5268h)

2023-06-06：iOS 17 Beta (21A5248v)

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