Thanks for getting back to us. Just a suggestion to check--has your friend enabled International Call Barring on his cell phone? If so, have him disable it. Also, has he checked with his cell provider?
Please let us know how this goes as there may be others in the Community experiencing the same problem, but haven't posted about it.
Need help changing SIM card? Find out more about activating your 4G ready SIM. 4G SIM Swap Help