The answer is that the APN settings are most likely misconfigured. Access Point Name (APN) settings define the gateway between your smartphone and the carrier’s data network, while SMS traffic travels over the control channel, which is separate from the data plane. This is why a user can still send and receive texts even when cellular data is not working but SMS works, because the device can authenticate and signal on the network without a valid APN. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of mobile network architecture and common troubleshooting steps; a frequent trap is assuming the SIM card is faulty or that airplane mode is to blame, but the key clue is that Wi-Fi internet works fine, isolating the issue to the cellular data path. A solid memory tip is to think of APN as the “address book” for data—without the right entry, your phone can still call (SMS) but can’t find the data highway.
220-1201 Mobile Device Network Connectivity Practice Question
This 220-1201 practice question tests your understanding of mobile device network connectivity. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A user's smartphone can send and receive text messages but cannot access the internet over cellular data. Wi-Fi internet works fine. Which setting is most likely misconfigured?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The APN settings are incorrect.
APN settings define how a device connects to the carrier's data network. If the APN is incorrect or missing, the device can still use SMS (which uses a different channel) but cannot establish a data connection.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The Wi-Fi hotspot is enabled.
Why it's wrong here
Enabling the hotspot would not prevent cellular data from working; it would share the connection.
✓
The APN settings are incorrect.
Why this is correct
APN (Access Point Name) settings are required for cellular data. If misconfigured, data will not work, but SMS and calls may still function.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Bluetooth is turned on.
Why it's wrong here
Bluetooth does not affect cellular data connectivity.
✗
The device is in roaming mode.
Why it's wrong here
Roaming mode affects data when outside the home network, but the user is likely on their home network since SMS works.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1201 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1201 question in full detail.
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Mobile Device Network Connectivity — This question tests Mobile Device Network Connectivity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The APN settings are incorrect. — APN settings define how a device connects to the carrier's data network. If the APN is incorrect or missing, the device can still use SMS (which uses a different channel) but cannot establish a data connection.
What should I do if I get this 220-1201 question wrong?
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A user reports that their iPhone cannot send or receive MMS messages, but SMS works fine. They have enabled cellular data. What is the most likely missing configuration?
medium
A.The phone's iMessage is disabled.
✓ B.The MMS APN settings are incorrect or missing.
C.The phone is in Airplane Mode.
D.The recipient's phone does not support MMS.
Why B: MMS requires specific APN settings for the carrier, including MMS proxy and port. Even with cellular data on, incorrect or missing MMS APN fields will prevent MMS from working.
Last reviewed: Jun 18, 2026
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