All users of iPhone 4, iPhone 3GS, iPad, iPad 2 and iPod touch 4G are recommended to update their device firmware to the latest version of iOS with the new update v4.3.1. This update addresses a lot of bugs such as the occasional glitch on the iPod touch 4G and some flickering problems with the Apple Digital AV Adapter for some TVs.
iOS update v4.3.1 also fixes the glitches experienced on activating and connecting to cellular networks. In order to download and this update for your Apple device, connect your device to your Mac or PC and click Check for Updates in iTunes. Click here to find out more about this update.