How can I update my iPhone 8

Perhaps if not directly from your wi-fi, might also try & update through

a computer. Depending on the model and brand, instructions vary.

Update your iPhone or iPad - Apple Support

//support.apple.com/en-us/HT204204

Inside link: newer & older Mac instructions, plus Windows PC instructions.

And wireless instructions; this article covers most aspects of basic update.

Update your iPhone, iPad, or iPod touch

• If you have an iPhone 5S or 6/6plus, the highest you can update to is 12.5.7

• If you have an iPhone 6S through 7, or SE 1st generation, you can update to 15.8.2

• If you have an iPhone 8 or X, you can update to 16.7.10

• If you have an iPhone SE (2nd generation or later), or XR through 15, you can update to 17.6.1

Go to Settings > General > Software Update.

This link will show you how to update your iPhone, iPad, or iPod touch using WiFi -

Update your iPhone or iPad - Apple Support

This link will show you how to update using your computer -

Update iOS on iPhone - Apple Support

How to update iPhone 8

not working my iPhone 8 upi peymet app

UPI requires iOS 17 which cannot run on your phone.

An iPhone 8 can only run iOS 16.7.7. If you want to use UPI, you will need an iPhone XR or higher capable of runninng iOS 17.

Update your iPhone or iPad - Apple Support

Use the links provided in this thread.

I want to update my phone

Apdate my phone