Today my iPhone 7 Plus stopped working. It has No Service and I can’t make calls. Lady at the Cricket Store told me I need to update my phone. So I did but it only did update 15.7.2 and stopped. Still no service. What do I need to do

Hello Daisy1201dog,

Welcome to Apple Support Communities. 

We understand that you are showing no service on your iPhone. We are happy to help.

Please try the steps here as they may resolve this: If you see No Service, Searching, or SOS on your iPhone or iPad - Apple Support

1. Check your coverage area
2. Restart your iPhone or iPad
3. Check for a Carrier Settings update
4. Turn your cellular line off and back on
5. Reset your Network Settings
6. Update your iPhone or iPad
7. Contact your carrier

If no issue resolution, we recommend this repair program: iPhone 7 Repair Program for "No Service" Issues - Apple Support

Let us know if you have further questions.

Take care.