Troubleshooting GSM Software Issue – SS2 Computer Hardware & GSM Repair Lesson Note (Third Term)

A GSM software issue is a fault in the programs that run a phone, such as the Android OS. It usually comes from corrupted files, a virus or full memory. The three common problems are boot loops, app crashes and malware. A technician always tries the simplest fix first.

Behavioural objectives

By the end of the lesson, students should be able to:

1. Distinguish between hardware and software in a phone.
2. Describe a boot loop and state its common causes.
3. Apply the steps for fixing an app crash.
4. Identify the symptoms of malware and use Safe Mode to remove a bad app.
5. Explain when and how a factory reset is done, and why a backup comes first.

What is the difference between software and hardware?

Before you start fixing a phone, you must ask: “Is the body broken, or is the mind confused?”

• Hardware is the physical part (like a cracked screen).
• Software is the invisible program (the Android OS) that runs the phone.

Most software issues happen because a file is “corrupted” (torn), a virus has entered, or the memory is too full. Today, we will learn how to fix the three biggest software headaches: boot loops, app crashes and malware.

What is a boot loop?

A boot loop is when a phone turns on, shows the logo (like TECNO, Samsung or Infinix), but then turns off and starts again. It is stuck in a “loop” and never reaches the home screen.

Common causes of a boot loop

1. Bad update: An Android update was interrupted (maybe the battery died).
2. Full storage: The phone’s memory is 100% full, and it does not have “room” to breathe and start up.
3. Rooting gone wrong: Trying to “hack” the phone incorrectly.

How to fix a boot loop

1. The soft reset: Hold the Power and Volume Down buttons for 10 seconds to “force” a fresh start.
2. Recovery Mode: If that fails, enter Recovery Mode and perform a Wipe Cache Partition. This cleans out old “junk” files without deleting your photos.

How do you fix app crashes?

An app crash is when you try to open WhatsApp or Facebook, and it immediately closes or shows an error message such as “Unfortunately, App has stopped”.

Why app crashes happen

The app and the phone’s Operating System are “arguing”. This usually happens after an update or if the app’s “data folder” is messy.

Troubleshooting steps

1. Clear cache: Go to Settings > Apps > [AppName] > Storage > Clear Cache. This is like giving the app a bath.
2. Clear data: If clearing the cache fails, tap “Clear Data”. Warning: This will log you out of the app and delete your chats if they are not backed up.
3. Update the app: Go to the Play Store. Often, the app developer has already released a “patch” to fix the crash.

What is malware and how do you remove it?

Malware (malicious software) is a program designed to steal your data, show you annoying ads, or slow down your phone. It is often called the “digital flu”.

Symptoms of malware

1. Your data or credit finishes very fast for no reason.
2. You see ads on your home screen even when no app is open.
3. The phone gets very hot even when you are not using it.

How to remove malware

1. Safe Mode: Hold the Power button, then long-press “Power Off” on the screen to enter Safe Mode. This starts the phone without any downloaded apps. If the problem stops, you know a “bad app” is the cause.
2. Uninstall the culprit: While in Safe Mode, find the app you downloaded just before the trouble started and delete it.

When do you use a factory reset?

The factory reset is the “last resort”. If the boot loop will not stop or the malware is too deep, perform a Factory Data Reset.

• What it does: It wipes the phone completely clean. It returns the software to exactly how it was when it left the factory in a box.
• The warning: You will lose everything: photos, contacts, music and messages. Always ask the customer: “Have you backed up your files to Google?”
• Hard reset method: If you cannot get into the settings, use the “button combo” (usually Power + Volume Up) to enter the secret Recovery Menu and select Wipe Data / Factory Reset.

Troubleshooting checklist

The teacher’s golden rule for troubleshooting

“Always try the simplest solution first. Do not format a customer’s phone and delete their memories if the problem could have been fixed by just clearing the cache of one app. A good technician is patient and careful!”

Evaluation

1. Define a boot loop and state three causes.
2. List the three steps for fixing an app that keeps crashing, in order.
3. State three symptoms of malware on a phone.
4. Explain how Safe Mode helps you find a bad app.
5. Why should you ask a customer about backups before a factory reset?

Assignment

A customer brings a phone that shows the Infinix logo, turns off and restarts again and again. Write the steps you would follow to fix it, from the simplest action to the last resort. State what you would tell the customer before the last step.