- A
The phone's iMessage is disabled.
Why wrong: iMessage is separate from MMS; disabling it does not affect MMS functionality.
- B
The MMS APN settings are incorrect or missing.
MMS requires proper APN configuration for the carrier, including MMS proxy and port, which are often separate from data APN.
- C
The phone is in Airplane Mode.
Why wrong: Airplane mode would disable all cellular functions, including SMS, which is working.
- D
The recipient's phone does not support MMS.
Why wrong: The issue is on the sender's side, as SMS works but MMS does not.
Question 427 of 1,020
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 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?
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 choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The MMS APN settings are incorrect or missing.
B is correct because MMS requires a properly configured APN (Access Point Name) to establish the data connection for sending and receiving multimedia content. Since SMS works (which uses the control channel, not data), but MMS fails despite cellular data being enabled, the most likely issue is that the MMS APN settings are incorrect or missing. Without the correct APN, the device cannot route MMS traffic through the carrier's multimedia messaging center.
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 phone's iMessage is disabled.
Why it's wrong here
iMessage is separate from MMS; disabling it does not affect MMS functionality.
- ✓
The MMS APN settings are incorrect or missing.
Why this is correct
MMS requires proper APN configuration for the carrier, including MMS proxy and port, which are often separate from data APN.
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.
- ✗
The phone is in Airplane Mode.
Why it's wrong here
Airplane mode would disable all cellular functions, including SMS, which is working.
- ✗
The recipient's phone does not support MMS.
Why it's wrong here
The issue is on the sender's side, as SMS works but MMS does not.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The 220-1201 exam often tests the misconception that MMS relies on iMessage or that enabling cellular data alone is sufficient, when in fact MMS requires a specific APN configuration separate from general data APN settings.
Detailed technical explanation
How to think about this question
MMS uses the MMSC (Multimedia Messaging Service Center) and requires an APN with specific fields such as MMSC URL, MMS proxy, and MMS port (e.g., 80 or 8080). On iOS, these settings are often carrier-provided automatically, but if the carrier profile is corrupted or if the device is unlocked and using a different carrier, manual configuration may be needed. A subtle behavior: even with cellular data enabled, if the APN lacks the 'mmsc' and 'mmsproxy' fields, the device will not establish the PDP context for MMS, causing a silent failure.
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.
TExam Day Tips
- 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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Mobile Device Network Connectivity — study guide chapter
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FAQ
Questions learners often ask
What does this 220-1201 question test?
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 MMS APN settings are incorrect or missing. — B is correct because MMS requires a properly configured APN (Access Point Name) to establish the data connection for sending and receiving multimedia content. Since SMS works (which uses the control channel, not data), but MMS fails despite cellular data being enabled, the most likely issue is that the MMS APN settings are incorrect or missing. Without the correct APN, the device cannot route MMS traffic through the carrier's multimedia messaging center.
What should I do if I get this 220-1201 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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.
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Last reviewed: Jul 4, 2026
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