Today it has been announced, that it will be the iOS 4.1 release date for the United States. This means that users with an iPhone or iPod will be able to upgrade to Apple iOS 4.1. While this comes as good news for some, others will not want to upgrade to the new iPhone 4.1 version just yet.

According to the iPhone DEV team, the new iOS will not be compatible with the iPhone Jailbreak, which was released last month. Whether the iPhone Jailbreak will be made available for iOS 4.1 is not yet known, but currently it is not. The DEV team may opt to wait until iOS 4.2 is released before announcing a new jailbreak.

The new operating system will include several minor upgrades to your device. iTunes features, Game Center, TV show rentals, AVRCP in-car control support, HDR photography, and a few other minor things have either been added or modified. A few bugs in the Bluetooth audio system as well as the proximity sensors have been fixed as well.

Before you decide to upgrade, make sure that you backup your iPhone or iPod, and be certain you don’t have your device jailbroken. If you do, it will no longer be jailbroken upon upgrading.

Are you upgrading your iPhone or is the jailbreak feature just too important to you?