Apple has rolled out the beta version of the iOS 9.2.1 update to developers for testing on various devices, including the iPad, iPhone, and iPod Touch.

According to 9to5Mac, the update comes just a week after the recently released public update 9.2, which included a couple of performance enhancements, as well as fixes for bugs in the latest Apple mobile device operating system.

Only developers who have registered through the iOS Dev Center are able to update their devices to the beta version with build number 13D11.

"The update does not appear to be available over-the-air, instead requiring using the Developer Center to install," 9to5Mac explained, adding that public testing of such versions usually occur a few days after the developers' were able to check the update for bugs.

The update reportedly included some tweaks under the hood, as well as improvements in features like the iBooks' 3D Touch support, better classical music listening experience in Apple Music and an Arabic-language Siri, as well as expanded support for the past and present adapters of the Lightning to SD Card Reader.

According to Gotta Be Mobile, the previous update, which was rolled out to the public earlier this month, also included extensive security patches against potential malware.

Other issues the update supposedly fixed includes the following, according to the outlet:

•  Improved stability of Safari and Podcasts
•  Issues that caused mail attachments to be inaccessible, particularly to users with POP email accounts
•  Issues involving attachments that overlap the text in mail
•  Issues with Live Photos that are turned off following restoration from a previous iCloud backup
•  Issues on zero search results in Contacts
•  Issues on the iPad where the Camera screen turns black when trying to record video
•  Issues that prevent data from appearing in Health
•  Issues that prevent an alarm from going off
•  Cases when some users were unable to access 'Find my iPhone'
•  Other accessibility improvements

However, the outlet warns iPad, iPhone and iPod users not to install the update if their device underwent jailbreak, or if they have not backed up their data, which will be lost once the operating system is upgraded.

Meanwhile, those who have yet to upgrade to the new Apple iOS 9 can get directions on how to do so in the company's official support website, which can be accessed through this link.

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