- A
Verify that the SIM card is not locked to the home carrier.
Why wrong: SIM lock prevents using other carriers, but the user has an international roaming plan, so the SIM should work with partner networks.
- B
Check if the device's date and time are set correctly.
Why wrong: Incorrect date/time can affect network authentication, but it's less likely to be the primary cause of no data after landing.
- C
Ensure that the device's data roaming setting is enabled.
Data roaming must be turned on to use cellular data on foreign networks; it's often disabled by default to prevent charges.
- D
Reset the device's network settings to default.
Why wrong: Resetting network settings is a more drastic step and should be done after checking simpler settings like data roaming.
Quick Answer
The answer is to ensure that the device’s data roaming setting is enabled. When a smartphone connects to a foreign network, the device must be explicitly configured to allow data transmission outside its home carrier’s coverage area; without this setting toggled on, the phone will block all cellular data even if an international roaming plan is active. On the CompTIA A+ Core 1 220-1201 exam, this scenario tests your understanding of mobile device connectivity troubleshooting, often appearing as a distractor where candidates mistakenly check APN settings or airplane mode first. The common trap is assuming a valid roaming plan alone guarantees data—remember that the software toggle is a separate prerequisite. A helpful memory tip: “Roam to roam” — you must enable roaming in settings before you can roam on data.
220-1101 Mobile Device Network Connectivity Practice Question
This 220-1201 practice question tests your understanding of mobile device network connectivity. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 is traveling internationally and complains that their smartphone's cellular data stopped working after landing. They have an international roaming plan activated. What should the technician check first to restore data connectivity?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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
Ensure that the device's data roaming setting is enabled.
When traveling internationally, devices often need to have data roaming enabled in the settings to use cellular data on foreign networks. This is a common oversight even with an active roaming plan.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Verify that the SIM card is not locked to the home carrier.
Why it's wrong here
SIM lock prevents using other carriers, but the user has an international roaming plan, so the SIM should work with partner networks.
- ✗
Check if the device's date and time are set correctly.
Why it's wrong here
Incorrect date/time can affect network authentication, but it's less likely to be the primary cause of no data after landing.
- ✓
Ensure that the device's data roaming setting is enabled.
Why this is correct
Data roaming must be turned on to use cellular data on foreign networks; it's often disabled by default to prevent charges.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Reset the device's network settings to default.
Why it's wrong here
Resetting network settings is a more drastic step and should be done after checking simpler settings like data roaming.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1201 NAT questions on configuration and troubleshooting.
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Mobile Device Network Connectivity — study guide chapter
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Mobile Device Network Connectivity practice questions
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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 — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Ensure that the device's data roaming setting is enabled. — When traveling internationally, devices often need to have data roaming enabled in the settings to use cellular data on foreign networks. This is a common oversight even with an active roaming plan.
What should I do if I get this 220-1201 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1201 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 18, 2026
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