This hardware requirement makes it unlikely that the fourth-generation i Pod can ever support i OS 7, so the previous version of Apple’s mobile operating is likely its end-of-life version.
There is no way to increase the memory of the fourth-generation i Pod.
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Here is a guide to help the install process go smoothly so you get up and running quickly on i OS 7 when it is released.There are two ways to upgrade your i OS device — over-the-air via your device’s wireless connection or by connecting your i OS device to your computer and letting i Tunes do most of the work.Updating your device wirelessly Before you start the download, plug in your device so the battery doesn’t drain during the update process.The i OS 6.1.5 release was issued to correct errors that caused Face Time video calls to fail.Apple understands that you and others will continue to use your older i Pod and i OS devices, so it has introduced a compatibility feature to support your device.