Hi @CliffhangerUk
Thank you for getting in touch with us and for providing with all the details. Since your child’s iPhone has signal, mobile data works, and the SIM/account is active, the problem is likely related to voice network settings rather than the Apple ID or billing. Here are the steps to troubleshoot:
. Check Call Forwarding / Silence Settings
Go to Settings > Phone > Call Forwarding – make sure it is off.
Go to Settings > Focus / Do Not Disturb – ensure no focus mode is silencing calls.
Check Blocked Contacts under Settings > Phone > Blocked Contacts – make sure no numbers are accidentally blocked.
Reset Network Settings
Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.
This clears old APN, cellular, and Wi-Fi settings but won’t delete apps or data.
After the reset, restart the phone and test calling again.
Test SIM in Another Phone
If possible, place the SIM in another unlocked phone and see if calls work.
This helps determine if the issue is the SIM/network or the iPhone itself.
Thank you,
Zandile
The iD Mobile Team