Bluetooth 4.0 (and LE) compatibility question

I have read that Bluetooth 4.0 is backward compatible to all protocol versions. (1) Do I understand it that an iOS based device with Bluetooth 4.0 (LE) can communicate with an Bluetooth 2.1 based device? Does that device need to be MFI compliant? kind regards Robert (1) http://de.wikipedia.org/wiki/Bluetooth#Aktueller_Standard:_Bluetooth_4.0 _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists.... This email sent to site_archiver@lists.apple.com