3.4 and 3.5 Troubleshooting Mobile Issues/Security Flashcards

1
Q

What is the first thing you should try if a mobile device is having issues?

A

Reboot the device. If this doesn’t solve the problem, reboot into safe mode (if on Android)

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2
Q

If your phone doesn’t work after a basic reboot, but does work after rebooting into safe mode, what is likely the problem?

A

A third-party app

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3
Q

Compare a device reset and a factory reset

A

Device reset closes all open apps and clears the memory, whereas a factory reset erases all data, applications and settings

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4
Q

What is a common reason an OS update may fail?

A

The device is too old to support updates/does not have minimum hardware requirements for the version of the OS

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5
Q

Other than device incompatiblity or age, give four other possible reasons a mobile OS update may fail.

A
  • Not enough power to install update
  • Network connectivity issues
  • Server may be busy
  • Not enough storage space available
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6
Q

Give three reasons why a mobile device may randomly reboot or have slow response times

A
  • Overheating
  • Low battery
  • Faulty hardware component
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7
Q

What are three easy things to check if an application is not launching/not operating properly?

A
  • Clear the cache for that app
  • Verify the app works on your version of the OS
  • Check storage space on device
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8
Q

What physical external factor can reduce the distance a signal can travel from a smartphone?

A

Using a thick protective case

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9
Q

Provide a quick fix for when Bluetooth isn’t connecting to an external device

A

Forget the BT device, then re-add and re-pair

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10
Q

What temperature range should electronic devices be kept within?

A

10-38 Celsius

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11
Q

How long do mobile device batteries usually last?

A

3-5 years

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12
Q

What percentage should you let the battery drain to before recharging to increase its lifespan?

A

20%

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13
Q

How does smart charge work?

A

It provides a slow trickle charge to the battery to extend its lifespan

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14
Q

Where would you go to turn rotation lock on/off in Android and iOS, respectively?

A

Android - Notification drawer (swipe down on status bar)
iOS - Control center (swipe up if iPhone has home button, swipe down from top-right screen corner if iPhone has face ID)

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15
Q

If rotation lock is enabled, what could be stopping the screen from autorotating?

A

A defective accelerometer or motion sensor

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16
Q

Differentiate between rooting and jailbreaking

A

They are the same thing, but rooting describes the process on Android devices and Jailbreaking describes the process on iOS

17
Q

What OS are Android devices based on?

18
Q

What does rooting allow?

A

It allows the hacker to get administrative rights on an Android device by exploiting vulnerabilites in the OS

19
Q

Define “sideloading”

A

Installing mobile apps on a devices that are not from the official app stores

20
Q

When would enterprise organisations use sideloading?

A

To install applications that can access private data

21
Q

Why may it not be a good idea to sideload?

A

Because the app could likely contain malware

22
Q

Give four symptoms that may point to a malware infection on a mobile device

A
  • High number of ads
  • Fake security warnings
  • Slow performance
  • Limited network connectivity
23
Q

Corrupted DNS on a mobile phone could cause what problem?

A

Limited network connectivity

24
Q

Slow performance on a mobile device could be caused by what?

A

Cryptomining or excessive sending of data

25
Q

How might you resolve a high number of ads on a mobile device?

A

Firstly, verify that privacy settings are enabled

26
Q

List three things that could cause a mobile device to have limited network connectivity

A
  • Corrupted DNS
  • Redirection attack
  • Proxy instaleld
27
Q

How does an on-path attack work?

A

The attacker intercepts, collects, or modifies information that the user is seeing, often for the purposes of stealing data

28
Q

Give three things that could cause a high amount of network traffic

A
  • DDoS
  • Mass email campaign
  • Cryptomining
29
Q

List 3 ways you can protect your mobile data from being leaked

A
  • Updated OS
  • Strong passwords
  • MFA