Download and install update on cellular data

you can only do that if you have a 5G plan with your carrier. otherwise, you need to use WiFi or a computer connected to the internet

how I can update my iPhone with my data without using WiFi

You need to update through your computer if you can’t use a WiFi network.

How I can do that because even I can’t get any app though on my phone now

ojo227 wrote:

how I can update my iPhone with my data without using WiFi

Please read the Apple Recommended post near the top of this page.