"I don't care which carrier you are on, which phone you have, it'll just update your phone accordingly," wrote Chris Walsh in a blog post.
The tool is meant to address recent, controversial delays to releasing WP7 updates. The glitches prompted Microsoft to halt a minor update on Samsung smartphones.
Walsh used Microsoft's own support tool to create a program that applies all WP7 updates at once. This includes "NoDo," which brings features like cut and paste to WP7 phones. The official updates are supposed to roll out on Tuesday, starting with the HTC HD7. Typically, Microsoft works with carriers to send over-the-air software updates.
"We really have to commend Microsoft here for being able to split up the OS updates into differential packs, which saves users downloading 200+ MB updates, unlike the IFruit updates," he added, referring to Apple.
As Walsh's instructions note, users need to download Microsoft's Windows Phone Support Tool before executing the ChevronWP7 Updater program. Walsh added a disclaimer saying downloading the hack will void your phone's warranty.
"There is NO revert process, again, flash at your own risk," he wrote.
Last November, Walsh, along with Rafael Rivera and Long Zheng, created a homebrew jailbreak called ChevronWP7 that unlocked the operating system. By January Microsoft had shut it down.