I have enough space, but it doesn’t download or install. Can you help me please

Make sure that your iPhone is setup to meet the following requirements before you attempt to update the iOS version over a Wi-Fi Network. Open Settings ➡️ General ➡️ Software Update: If there is an update available for your iPhone then it will be listed here. Follow the on-screen instructions to download and update your iPhone. 

• Your iPhone must have a fast Wi-Fi connection; you cannot update over cellular data or a cellular hotspot
• The iPhone can not be in Low Power mode
• The battery state of charge must be above 50%
• Your iPhone must have at least 8GB or more free storage space
• Your iPhone cannot be connected through VPN
• You should leave the phone plugged in until it finishes updating, both to assure that it remains above 50% and to keep Wi-Fi enabled (Wi-Fi turns off when the phone sleeps if not connected to power).

Axel F.

somaya24 Said:

"I have enough space, but the last version doesn’t download or install"

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Updating an iPhone 12:

A. Update Using a Computer:

Have a Computer Handy? If so, try using a computer to update. Go here: Update your iPhone Using a Computer - User Tip. If any updates are availabe, they will install, sure enough.

B. Updating an iPhone Through Cellular:

Updating your iPhone using Cellular is an option for your model (12). This is because the model has the builtin hardware for this. See my User Tip: Use an iPhone 12 or later, that is using 5G, in order to update over Cellular - User - Tip

What error message is displayed when you try to run the update?