Podcast
Questions and Answers
What happens to the capacity of a mobile device's battery each time it is recharged?
What happens to the capacity of a mobile device's battery each time it is recharged?
What is one recommended way to conserve battery life when out of the signal range?
What is one recommended way to conserve battery life when out of the signal range?
Which feature is NOT disabled when airplane mode is activated?
Which feature is NOT disabled when airplane mode is activated?
Where can users find the configuration options related to battery usage on mobile devices?
Where can users find the configuration options related to battery usage on mobile devices?
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What should you look for if a battery appears to be swollen?
What should you look for if a battery appears to be swollen?
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Which component continues to drain battery life when outside of a service provider’s signal?
Which component continues to drain battery life when outside of a service provider’s signal?
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What may happen if you frequently use a mobile device without replacing the battery over time?
What may happen if you frequently use a mobile device without replacing the battery over time?
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Which of the following does airplane mode NOT typically affect?
Which of the following does airplane mode NOT typically affect?
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What should you absolutely avoid doing to a water-damaged device while it is drying?
What should you absolutely avoid doing to a water-damaged device while it is drying?
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Which action is suggested if your device's screen is unresponsive and appears black?
Which action is suggested if your device's screen is unresponsive and appears black?
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What is a common symptom that may indicate a device has been infected with malware?
What is a common symptom that may indicate a device has been infected with malware?
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What should you do if you observe your device overheating?
What should you do if you observe your device overheating?
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What is the recommended minimum time to let a water-damaged device dry before attempting to power it on?
What is the recommended minimum time to let a water-damaged device dry before attempting to power it on?
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If you have an Apple device that is completely unresponsive, what is one method to perform a hard reset?
If you have an Apple device that is completely unresponsive, what is one method to perform a hard reset?
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Why should you avoid putting your device directly in sunlight?
Why should you avoid putting your device directly in sunlight?
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What could be a cause for an interface charging improperly on a device?
What could be a cause for an interface charging improperly on a device?
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What can a high rate of data transfer indicate on a device?
What can a high rate of data transfer indicate on a device?
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What might a user check if their device shows symptoms of malware?
What might a user check if their device shows symptoms of malware?
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What is one of the risks when a device overheats frequently?
What is one of the risks when a device overheats frequently?
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Which of the following issues can indicate physical damage to a device's charging interface?
Which of the following issues can indicate physical damage to a device's charging interface?
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What may happen if the internal temperature of a mobile device exceeds its limit?
What may happen if the internal temperature of a mobile device exceeds its limit?
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What combination of buttons is commonly used for a hard reset on many Android devices?
What combination of buttons is commonly used for a hard reset on many Android devices?
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What steps should you take if your device has a swollen battery?
What steps should you take if your device has a swollen battery?
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Why is it necessary to replace the entire display when the screen glass is broken?
Why is it necessary to replace the entire display when the screen glass is broken?
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What should you do if you find broken glass on your mobile device?
What should you do if you find broken glass on your mobile device?
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What could cause your mobile phone to charge very slowly?
What could cause your mobile phone to charge very slowly?
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Where is the liquid contact indicator (LCI) located in a mobile device?
Where is the liquid contact indicator (LCI) located in a mobile device?
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If your device comes into contact with water, what is the first action you should take?
If your device comes into contact with water, what is the first action you should take?
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Why might using rice to dry out a wet phone be ineffective?
Why might using rice to dry out a wet phone be ineffective?
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Which of the following can interfere with Wi-Fi signal strength?
Which of the following can interfere with Wi-Fi signal strength?
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What is a common troubleshooting step if your phone doesn't charge?
What is a common troubleshooting step if your phone doesn't charge?
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What should you check if your cellular signal is poor in certain locations?
What should you check if your cellular signal is poor in certain locations?
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Why should you avoid puncturing an intact battery package?
Why should you avoid puncturing an intact battery package?
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What might indicate a battery is faulty aside from physical swelling?
What might indicate a battery is faulty aside from physical swelling?
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What is the main risk of glass from a broken mobile device screen?
What is the main risk of glass from a broken mobile device screen?
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What is an important precaution when charging a device with a slow charging issue?
What is an important precaution when charging a device with a slow charging issue?
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Study Notes
Mobile Device Maintenance and Troubleshooting
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Battery Degradation: Battery capacity decreases with repeated recharging over time. Replacement is often the best solution.
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Signal Strength and Airplane Mode: Being outside a provider's network range drains battery. Enabling airplane mode disables radios, conserving battery life. Airplane mode also disables 802.11, Bluetooth, and GPS radios.
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Battery Usage Monitoring: Built-in battery features (Settings > Battery) can help identify high-usage apps.
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Swollen Batteries: Batteries may swell due to gas buildup. Never open or puncture a swollen battery; dispose of it properly at a hazardous waste facility, and stop using the device immediately.
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Screen Damage: Mobile device screens are often made of glass, and fragile. If cracked, the entire display may need replacement; backup the device first. Protect broken areas with tape to avoid injury.
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Charging Issues: Check the charging port (clean it carefully) and the charging cable (ensure it's good). Use a multimeter to check voltage if charging is slow.
Network Connectivity
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Variable Signal Strength: Signal strength varies depending on location within buildings, and availability from nearby networks such as Wi-Fi and cellular systems. A signal strength meter can help in areas with poor reception.
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Wi-Fi Interference: Interference from other Wi-Fi networks or devices using the same frequencies can affect Wi-Fi performance. Change Wi-Fi channel frequencies for enhanced throughput.
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Cellular Network Signal: Devices outside large cellular network areas will present degraded signals.
Water Damage
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Liquid Contact Indicators (LCIs): Devices have LCIs that change color when exposed to liquid.
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Water Damage Procedure: Power down immediately, avoid plugging in, remove mobile device components (case, cards, battery). Don't use rice to dry out devices; silica gel packs are better. Allow the device to completely dry before attempting to use it
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Water Damage Recovery: Avoid power, heat, and device movement. Wait at least a day to see if the device can be recovered.
Overheating
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Heat Sensors: Devices include sensors to monitor temperature and turn off when overheating to prevent damage. Heat is generated by charging/discharging, CPU operation, and display use.
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App Usage Tracking: Monitor CPU use by individual apps to detect and manage potential overheating issues.
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Prevent Overheating: Avoid direct sunlight to prevent rapid device heating.
Device Malfunctions
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Screen Failure: If the screen is completely unresponsive, perform a reset. Apple devices can use soft resets (power button) or hard resets (power and volume). Android devices often use hard resets (battery removal or button combinations.)
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Interface Damage: Damaged connectors (bent pins) require an entire system board replacement, as they are integrated with system boards.
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Malware Detection: Monitor for unusual apps, data transfer patterns, pop-up messages, high CPU usage, and overheating to identify malware. Use third-party antivirus/malware protection to detect issues if no symptoms are present.
Other
- Cursor Drift: Calibration apps are used to address cursor drift in older technologies. Use the built-in tool if your device has one.
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Description
Test your knowledge on maintaining and troubleshooting mobile devices. This quiz covers key topics such as battery degradation, signal strength, and screen damage. Learn the best practices for handling issues like swollen batteries and charging problems.