Updating 3g nano firmware manually
Step 2: Click on device button to the left of i Tunes Store button at the top right corner in i Tunes.
Step 3: Click on "Check for Update" without pressing any keys.
If the i OS 8.2 update is available, it will automatically download and install on your device.
Step 4: Alternatively, you may get a popup message informing you that the new update is available. If it says i OS 8.2 is the latest version, then download the appropriate firmware file via download links provided above.
Step 6: Wait for a popup message that reads i Tunes will update your i Phone/i Pad/i Pod touch to i OS 8.2 and will verify with Apple. Step 7: You will now see the release notes for i OS 8.2.
Click Nextand then click Agree to accept the terms and conditions.
Step 8: The firmware file will now be downloaded via i Tunes (which can take longer than expected as it is a huge file of size 1.5 GB to 2GB).
Note: Locate the model number at the back of your device.It offers the best Bluetooth smartphone support, easy setup, and the simplest interface of any of the models we’ve looked at, some of which cost over twice as much.As a veteran auto journalist, I’ve played with just about every car entertainment system worth looking at.Step 5: Once the firmware file is downloaded, hold Option key (Mac) or Shift key (Windows) and click on "Check for Update".Important: Remember to click Check for Update button, and not the Restore i Phone button to avoid accidentally restoring your i Phone and erasing all data on it.
It is advisable to connect your device directly via Wi-Fi to avoid data downloading charges over the 3G/4G connection of your smartphone.