Hello my phone refuses to update and give me no service

Start here: https://support.apple.com/en-us/HT201415

1.

There is no service on your iPhone .  .  .  .  ., read the Apple article suggested by kb1951.

2.

For Mobile Data update see this Apple article: Manually update your carrier settings on your iPhone or iPad

https://support.apple.com/en-us/HT201270

3.

Also charge the iPhone.