A user is unable to use any Internet-related functions on a smartphone when it is not connected to WiFi. When the smartphone is connected to WiFi, the user can browse the Internet and send and…

Question

Options

• AThe smartphone's line was not provisioned with a data plan
• BThe smartphone's SIM card has failed
• CThe smartphone's Bluetooth radio is disabled
• DThe smartphone has too many applications open

• A
  82% (45)
• B
  5% (3)
• C
  9% (5)
• D
  4% (2)

Explanation

The key diagnostic clue is the split behavior: WiFi-based internet works, but cellular internet does not, while calls and texts still work. Calls and text messages use the cellular voice and SMS channels, which function independently of a mobile data plan. Cellular internet browsing and email require a separate mobile data plan provisioned by the carrier. The absence of that plan perfectly explains why internet functions fail over cellular but work over WiFi. A failed SIM card would also break calls and texts. Bluetooth has no role in cellular data. Too many open apps would degrade performance but not selectively block all cellular data.

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