Trouble updating ipod touch
Press and hold power button again, and turn your i Pod touch back on.
Another very simple solution, which is also one of the most effective ones.
This is something that can fix Wi-Fi issues not only on i Pod touch but also on other i OS devices, including i Phone and i Pad. Unplug the power connector from the modem and the router, wait for a minute, and plug it back in.
Sometimes, that’s all you need to do, and you will be able to connect to a Wi-Fi network normally.
You will have to do it via i Tunes, but before you start, get the latest version of i Tunes.
So, if there is a new version, and you still didn’t get it, now is the time to do so.Note: Restoring i Pod Touch with i Tunes will erase all songs, photos and other data on the i Pod device.If you don't have a backup, you'll lose all data.When you decide to reset network settings, cellular settings, APN and VPN settings, Bluetooth pairing records, Wi-Fi networks, saved passwords, etc.will reset as well, but since this step can fix the issue, you should definitely try it out.
If you want to update i Pod Touch to i OS 4.2.1, here are the steps to do it.update your i Pod Touch to i OS 4.2.1 in two ways : Automatically and Manually.