3.4 and 3.5 Troubleshooting Mobile Issues/Security Flashcards
What is the first thing you should try if a mobile device is having issues?
Reboot the device. If this doesn’t solve the problem, reboot into safe mode (if on Android)
If your phone doesn’t work after a basic reboot, but does work after rebooting into safe mode, what is likely the problem?
A third-party app
Compare a device reset and a factory reset
Device reset closes all open apps and clears the memory, whereas a factory reset erases all data, applications and settings
What is a common reason an OS update may fail?
The device is too old to support updates/does not have minimum hardware requirements for the version of the OS
Other than device incompatiblity or age, give four other possible reasons a mobile OS update may fail.
- Not enough power to install update
- Network connectivity issues
- Server may be busy
- Not enough storage space available
Give three reasons why a mobile device may randomly reboot or have slow response times
- Overheating
- Low battery
- Faulty hardware component
What are three easy things to check if an application is not launching/not operating properly?
- Clear the cache for that app
- Verify the app works on your version of the OS
- Check storage space on device
What physical external factor can reduce the distance a signal can travel from a smartphone?
Using a thick protective case
Provide a quick fix for when Bluetooth isn’t connecting to an external device
Forget the BT device, then re-add and re-pair
What temperature range should electronic devices be kept within?
10-38 Celsius
How long do mobile device batteries usually last?
3-5 years
What percentage should you let the battery drain to before recharging to increase its lifespan?
20%
How does smart charge work?
It provides a slow trickle charge to the battery to extend its lifespan
Where would you go to turn rotation lock on/off in Android and iOS, respectively?
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)
If rotation lock is enabled, what could be stopping the screen from autorotating?
A defective accelerometer or motion sensor
Differentiate between rooting and jailbreaking
They are the same thing, but rooting describes the process on Android devices and Jailbreaking describes the process on iOS
What OS are Android devices based on?
Linux
What does rooting allow?
It allows the hacker to get administrative rights on an Android device by exploiting vulnerabilites in the OS
Define “sideloading”
Installing mobile apps on a devices that are not from the official app stores
When would enterprise organisations use sideloading?
To install applications that can access private data
Why may it not be a good idea to sideload?
Because the app could likely contain malware
Give four symptoms that may point to a malware infection on a mobile device
- High number of ads
- Fake security warnings
- Slow performance
- Limited network connectivity
Corrupted DNS on a mobile phone could cause what problem?
Limited network connectivity
Slow performance on a mobile device could be caused by what?
Cryptomining or excessive sending of data
How might you resolve a high number of ads on a mobile device?
Firstly, verify that privacy settings are enabled
List three things that could cause a mobile device to have limited network connectivity
- Corrupted DNS
- Redirection attack
- Proxy instaleld
How does an on-path attack work?
The attacker intercepts, collects, or modifies information that the user is seeing, often for the purposes of stealing data
Give three things that could cause a high amount of network traffic
- DDoS
- Mass email campaign
- Cryptomining
List 3 ways you can protect your mobile data from being leaked
- Updated OS
- Strong passwords
- MFA
