No Service, Sim-lock how may I fix this issue
I'd like to know how to fix this issues on my iPhone 7 no service, mobile data update failed, no network, and also sim lock
See -> If you see No Service, Searching, or SOS on your iPhone or iPad
If you see No Service, Searching, or SOS on your iPhone or iPad - Apple Support
Manually update your carrier settings on your iPhone or iPad
Manually update your carrier settings on your iPhone or iPad - Apple Support
Update your network provider settings manually on your iPhone or iPad
Update your network provider settings manually on your iPhone or iPad – Apple Support (UK)
Check -> iPhone 7 Repair Program for "No Service" Issues
iPhone 7 Repair Program for "No Service" Issues - Apple Support
If the range of the mobile network (Service) is fix, you will have network again.
Check also the Wi-Fi.
If they are On, turn Off Hotspot & VPN.
and also sim lock
See this Apple article: Use a SIM PIN for your iPhone or iPad
Use a SIM PIN for your iPhone or iPad - Apple Support