A Verizon insider allegedly tipped Android and Me of yummy details regarding the software maintenance release (MR) that Verizon promised for the HTC Thunderbolt.

The tipster confirmed the definitive date for the release (June 30) but cautioned that the release specifications could still change a bit. And, there’s more: the software release will bring Android 2.3.4 Gingerbread to the HTC Thunderbolt. The update will also include access to the Amazon Appstore, Skype video functionality, compatibility for GTalk, and HTC Sense 2.1 UI.

Thunderbolt users expectant of the upcoming update are hoping it will come with the unlocked bootloader that HTC chief Peter Chou promised for HTC devices. Many users are also hoping for vanilla Android 2.3.4 Gingerbread, but their hope bubble may burst quickly, as HTC doesn’t seem to have the heart to abandon its Sense UI that easily.

Thousands of users adore the HTC Thunderbolt, but only when it’s on. Since the last over-the-air (OTA) software maintenance release update sent out by Verizon Wireless last May, HTC Thunderbolt users have been experiencing lightning-fast reboots on their Android devices. Issues with signal strength and GPS inaccuracy have been reported, as well.

The software update is expected to resolve the issues on frequent reboots and signal troubles. Several users, however, have reported not getting any of these woes even if they availed themselves of the OTA update last May.

Verizon and HTC have both taken serious note of the post-update anomalous behavior of the HTC Thunderbolt, but have guaranteed no short-term fix for the matter, according to an insider tip received by Android Central last week. The leaked memo showed two strategies that Verizon tech support and customer reps were supposed to use for irate customers: (1) if the reboots are severe and are “unacceptable” according to the user’s subjective perspective, the user can ask for a CLNR (certified-like-new replacement) device; and (2) if the reboots are infrequent and tolerable, the user will be assured of a fix in an upcoming software maintenance release update expected to be delivered around second half of June.

Are you getting your HTC Thunderbolt bumped up to Android 2.3.4 Gingerbread by the end of this month?