A software update for T-Mobile’s Galaxy SII is dropping today, bringing several enhancements pertaining to the handset’s battery performance, wireless network issues and Caller ID problems. According to a support page over at the T-Mobile USA web site, an over-the-air firmware update will upgrade the device to Android 2.3.5 (build T989VUVKL1).

The software update will also be available via Kies mini and is not required so you can opt out of the upgrade and continue using the previous software version. The company also tweeted that the white version of the Galaxy SII smartphone is available today via their online store.

According to their Facebook page, “a new white color option that will be available for T-Mobile customers just in time for the holidays”. The carrier also reiterated in the post comments that “we do not have any new information regarding the iPhone coming to T-Mobile”, instead pointing folks to their September 26 blog post on the prospect of T-Mobile iPhone.

The carrier also aired an interesting commercial pitting Apple’s iPhone 4S against HTC’s Amaze 4G in an arcade fight.