A user is unable to use any internet-related functions on a smartphone when it is not connected to Wi-Fi. When the smartphone is connected to Wi-Fi, the user can browse the internet and send and receive email. The user is also able to send and receive text messages and phone calls when the smartphone is not connected to Wi-Fi. Which of the following is the MOST likely reason the user is unable to use the internet on the smartphone when it is not connected to Wi-Fi?


A. The smartphone's line was not provisioned with a data plan
B. The smartphone's SIM card has failed.
C. The smartphone's Bluetooth radio is disabled
D. The smartphone has too many applications open