Have you ever heard the saying that the exact date of the very first automobile race can be pinpointed by knowing the exact date of the completion of the second car? Well, human nature being human nature, people started looking for ways to jailbreak Windows Phone 7 devices on the day of introduction - November 7. Yesterday, new software was introduced called Chevronwp7 that (supposedly) unlocks Win7 handsets so a user can add non-approved applications (called "side-loading") and bypassing the $99 annual Microsoft fee for using developer software. Read about Chevronwp7 here at WinRumors. Here's a screenshot of the software:
Today, Microsoft released a statement in response to the Chevronwp7 rollout that claims you can brick your device with its use:
Istartedsomething, a respected developer hangout and (ironically) one of the "creators" of the new Chevronwp7, indicated to us a method for jailbreaking was discovered within a few days after Windows Phone 7 devices became available on November 7. Read our article here. However, if I was a user of WinPhone7 I would probably opt to err on the side of caution - and not jailbreak my device for a while until it was established if,or not, it could be safely done.
Sources: All the Usual Smartphone Pirates