I want to update to ios 15.1

Update your iPhone, iPad, or iPod touch - Apple Support

not enough storage space?

If you need more space for an update on your iPhone, iPad, or iPod touch - Apple Support

issues?

Updating iOS: common issues and solutions - Apple Community

video..

Noorey Said:

"I want to update to ios 15.1: I find it difficult to update it to ios 15.1"

-------

Give Apple Feedback:

Do your part: Let Apple know what is going on here. Provide them with feedback on this. They may not get back to you directly, but the more feedback they received on this, the more they will know what is going on, and what needs to be fixed in updates to come.

1. Go Here: Feedback - iPhone - Apple
2. Comment: on why you find it difficult to update it to ios 15.1
3. Select: "Performance" for the "Feedback Type"
4. Proceed from there aw necessary

Noorey Said:

"I want to update to ios 15.1: I find it difficult to update it to ios 15.1"

-------

To Check for Updates:

Use a Computer and Ethernet:

Start with attempting an update through use of a computer. If you cannot use Wi-Fi, then use Ethernet.  Go Here: Update your iPhone Using a Computer - User Tip. On the computer, you would connect it through Ethernet, going directly into your router. For a Mac (or PC) that does not have Ethernet, this would be the adapter to use: Belkin USB-C to Gigabit Ethernet Adapter - Apple. If you get the same error, the model is likely just not compatible.