A user traveling overseas is in a place where there is access to WiFi. The user can receive email
and talk using VoIP, but cannot place or receive phone calls. Which of the following is the MOST
likely cause of this issue?

A.
The phone will need a new SIM card

B.
Incompatible cellular technology

C.
ICCID needs to be changed

D.
IMEI needs to be changed

Explanation: