My sons phone say activated but no cell services

@user_1xclgs Thank you for reaching out about your son's new device. Are you still experiencing issues at this time? If so, can you please share what you have tried? 

Have you: 

Restarted the phone? This forces the phone to re‑register on the network.

If it says “No Service” or “SOS Only”, the phone isn’t connecting yet.
If there are bars but no data/calls, it may be a network or SIM issue.

Depending on the phone type:

Physical SIM

Power the phone off
Remove and reinsert the SIM card
Power back on

If its an eSIM then go to:
Settings → Cellular / Mobile Data
Make sure the line is Turned 'ON'
Set as the default line (if multiple lines exist)

Please let us know if this helps or you are still in need of assistance.