220-1101 Question 38
Single answerEnter the appropriate personal identification number (PIN) codeA user asks a technician to help reconnect a company smartphone to the cellular network after the device was factory reset. During setup, the phone detects the SIM card but displays a prompt to enter a PIN before it will register on the network. The user says they never changed any security settings and just wants service restored as quickly as possible. What should the technician do FIRST?
- A
Enter the SIM card's default PIN provided by the carrier or listed in the carrier documentation
- B
Enter the device screen-lock PIN that the user normally uses to unlock the phone
- C
Power cycle the phone three times to clear the SIM security prompt
- D
Remove the SIM card and connect to Wi-Fi instead, because the PIN prompt indicates the SIM has failed
Show answer and explanation
Correct answer: A
Explanation
This question tests the ability to distinguish between different mobile device authentication methods in a real support scenario. On smartphones, a SIM PIN is separate from the device passcode or screen-lock PIN. When a phone prompts for a PIN before connecting to the carrier network, the correct action is to enter the appropriate SIM PIN, typically the carrier's default if the user never changed it. Best practice is to verify the code from carrier documentation, SIM packaging, or the carrier's support resources rather than guessing, because too many incorrect attempts can lock the SIM and require a PUK (Personal Unblocking Key). This aligns with standard mobile device support procedures covered in CompTIA A+ Core 1 objectives related to mobile device configuration and subscriber identity modules.
- A. Correct.
Correct. In this scenario, the phone is asking for the SIM PIN, not the device unlock PIN. If the user never changed the SIM security settings, the appropriate first step is to use the default SIM PIN supplied by the carrier or documented with the SIM/card packaging. This is the standard, practical action before attempting more invasive troubleshooting. A technician should also be cautious, because repeated incorrect entries can lead to a SIM lock requiring a PUK from the carrier.
- B. Incorrect.
Incorrect. A common mistake is confusing the device's lock-screen PIN with the SIM PIN. These are separate security mechanisms. The screen-lock PIN protects access to the phone itself, while the SIM PIN protects use of the subscriber identity module on the cellular network. Entering the wrong code repeatedly could lock the SIM.
- C. Incorrect.
Incorrect. Restarting the phone does not clear a SIM PIN requirement. The prompt appears because SIM security is enabled and the SIM must be authenticated before the phone can register on the carrier network. This option reflects a typical but ineffective basic troubleshooting step for a security-related prompt.
- D. Incorrect.
Incorrect. A SIM PIN prompt does not indicate hardware failure of the SIM. It indicates that the SIM is present and recognized, but locked pending PIN entry. Connecting to Wi-Fi may allow internet access, but it does not restore cellular service and does not address the actual problem.