Apple’s special event Rock and Roll is just now on the distance of few hours, which is going to be held on 9 September, 2009 and kicked off at 10a.m. (Pacific time). This is not conformed yet that what would be presented and revealed in that event but according to some analyst’s view point probably one of the Apple’s announcement will relate to iPhone OS 3.1.

So, iPhone Dev Team just has published a blog post in which they warned jailbroken or unlocked iPhone users that they should not get upgrade via iTunes for new iPhone OS 3.1, if it’ll be announced and rolled out tomorrow at Apple’s Rock and Roll event. Further more iPhone Dev Team says

”This week Apple will be all over the news with their announcements at Wednesday’s “Let’s Rock” event. But with so many new owners of the iPhone 3GS, and with so many new owners of the iPhone 3G (perhaps sold to them by these new 3GS owners)…now is a good time to send out this general advisory.

If you update to Apple’s new software using the normal iTunes process, you will lose your ultrasn0w unlock. In fact you may lose it permanently, because for most people the baseband firmware cannot be reverted to a previous version (unlike the main application CPU firmware).

But don’t worry…our PwnageTool program lets you update your main firmware without touching your baseband firmware, so you can still have the best of both worlds. But you must be diligent about saying “no” to your iTunes request this week to update your firmware.”

So, stay tuned for further updates about Apple’s Rock and Roll event and iPhone Dev Team recommendations.