The last upgrade to the iPhone firmware, version 2.1, patched mainly 3G call reception. Apple has now released another firmware update for the iPhone, version 2.2, fixing multiple issues that apply to both multimedia and integrated software. Podcasts can now be downloaded over-the-air by users, while Google Maps also now offers the option of seeing Street View. Walkers will also enjoy the new walking and public transportation modes found in Google Maps. Users can likewise disable the feature that auto corrects misspellings, which many people use on a daily basis. Other improvements also include both a tweaked Mail and Safari, fixes for numerous security holes, and better overall sound quality from visual voicemail. The update can be downloaded through iTunes, and weighs in at a total of roughly 250 MB.