How do I fix Error 21 on iPhone 4s?

How do I fix Error 21 on iPhone 4s?

Fix iTunes error 21 or iPhone error 21 through recovery mode

1. Put your device into DFU Mode. Hold the power button down for 3 seconds.
2. Connect to iTunes. Plug your iPhone into your computer, and access iTunes.
3. Restore iTunes. Open the ‘Summary’ tab in iTunes, then click ‘Restore.

Why is my iPhone saying iTunes Restore?

If you still see the Restore screen after you restart, you need to reinstall iOS or iPadOS: On your Mac, make sure that you’ve installed the latest software updates (including iTunes if you have MacOS Mojave or earlier). Click Update (not Restore) to reinstall iOS or iPadOS and keep your personal data.

How do I fix error code 4013 on Apple?

How to Fix iPhone Error 4013

1. Install the latest version of iTunes. The most common cause of iPhone error 4013 is software.
2. Force restart the iPhone or iPad.
3. Connect the device to iTunes and update it.
4. Check for updates on the Mac or PC.
5. Try a different USB cable.
6. Restore using a different computer.
7. Contact Apple.

What do you do when your iPhone is stuck on restore?

6 Solutions to Fix iPhone Stuck on Restore Screen

1. Tip 1. Use Original USB Cable.
2. Tip 2. Use a Free Tool to Exit iPhone Restore Screen with One Click.
3. Tip 3. Update iTunes.
4. Tip 4. Force Restart iPhone.
5. Tip 5. Use an Advanced Method.
6. Tip 6. Use DFU Mode to Restore iPhone via iTunes.

How to fix error 3194 in iTunes update?

1 Quit iTunes. Make sure iTunes is completely closed before proceeding so that the changes you make take effect. 2 Open the hosts file on the computer. Error 3194 most often appears when you are trying to update or restore your iOS device through iTunes, and iTunes cannot connect 3 Find the bottom of the hosts file.

What to do when iTunes says your iPhone is in recovery mode?

Hold home button continuously until iTunes shows message “your device in now in recovery mode” in iPhone/iPad/iPod touch. Step 6: Now, if you are updating your firmware, you’ll have to click on Shift + Restore (Win) / Option + Restore (Mac) and point it to the iOS ipsw file you downloaded in step 1.

How can I restore my iPhone to factory settings?

Select your iOS device from the top menu. Click the “All Devices” menu and select the iOS device you want to restore. Click the “Erase” button in the iOS device’s card. After confirming, the iOS device will begin automatically resetting to factory settings.

Why is there an unknown error in iTunes?

An unknown error occurred (3194).” iTunes error 3194 happens when iTunes cannot connecting or communicate with Apple’s firmware signature verification server. For most cases, it is because a tweak modified the hosts file thereby blocking Apple’s servers, usually when users modify their devices with jailbreak utility.