3 ms·In fact, I believe this was available in iOS 3.2. But definitely on all devices as of 4.0.by jbrennan 16y agoIn fact, I believe this was available in iOS 3.2. But definitely on all devices as of 4.0.uxp 16y agoiOS 3.2 is not available for the iPhone and iPod touches, if I'm not mistaken, so you would still only be targeting iPads that have failed to update to 4.2.1 and/or 4.3.jbrennan 16y agoPrecisely.