A leaked internal document has surfaced on the internet disclosing that Samsung is in the process of internally testing the new, unannounced Android 4.4.3 update on both the Snapdragon and Exynos-powered variants of the Galaxy S5, together with the LTE-A edition of the Galaxy S4.

In addition to the 4.4.3 update, the document also reveals that the South Korean company is preparing to rollout the much-anticipated 4.4.2 upgrade to several of its former flagship smartphones, including the Galaxy Note II, Galaxy S3, Galaxy S4, Galaxy Note 3 Neo, Galaxy Grand 2 and Galaxy Mega.

Thanks to Android Police and its source running a test build of the much-anticipated upgrade on a Nexus 5 we have the full, rumored changelog for the upcoming 4.4.3 update, which can be seen below:

• Frequent data connection dropout fix
• mm-qcamera-daemon crash and optimization fixes
• Camera focus in regular and HDR modes fixes
• Power Manager display wakelock fix
• Multiple Bluetooth fixes
• Fix for a random reboot
• App shortcuts sometimes got removed from launcher after update
• USB debugging security fix
• App shortcuts security fix
• Wi-Fi auto-connect fix
• Other camera fixes
• MMS, Email/Exchange, Calendar, People/Dialer/Contacts, DSP, IPv6, VPN fixes
• Stuck in activation screen fix
• Missed call LED fix
• Subtitle fixes
• Data usage graph fix
• Internet telephony fix
• FCC compliance fix
• Miscellaneous fixes

Be sure to check back as we’ll you know the minute the over-the-air update starts rolling out.