A slow Android phone can be frustrating. Apps take time to open, scrolling feels laggy, and even simple tasks like messaging become delayed. The good news is that you don’t always need a new phone—most performance issues can be fixed with simple optimizations.
This guide explains how to speed up a slow Android phone easily, along with useful tips, safe maintenance methods, and answers to commonly searched Android dial code questions.
1. How to Make a Slow Android Phone Fast?
If your Android phone has become slow, it is usually due to storage issues, background apps, outdated software, or heavy animations. Here’s how to fix it step by step:
a. Clear Unnecessary Apps
Unused apps consume storage and background memory.
Steps:
- Go to Settings
- Open Apps
- Uninstall apps you don’t use
Result:
Frees RAM and storage, improving speed instantly.
b. Clear Cache Regularly
Apps store temporary files called cache.
Why it matters:
Too much cache slows down performance.
Steps:
- Settings → Storage → Cached data → Clear
c. Restart Your Phone Often
A simple restart:
- Clears memory
- Stops background processes
- Refreshes system performance
d. Update Software
System updates fix bugs and improve speed.
Steps:
- Settings → Software Update → Download and install
e. Reduce Animations
Animations make phones look smooth but slow down older devices.
How to disable:
- Enable Developer Options
- Reduce animation scale
f. Free Up Storage Space
A nearly full storage slows down Android significantly.
Tips:
- Delete large videos
- Move files to cloud storage
- Remove duplicate photos
g. Limit Background Apps
Too many apps running in background slow performance.
Fix:
- Settings → Battery → Background usage limits
2. Advanced Tips to Boost Android Speed
a. Use Lite Apps
Apps like Facebook Lite or Messenger Lite use fewer resources.
b. Disable Bloatware
Pre-installed apps often run in background. Disable them if not needed.
c. Use Lightweight Launcher
Switch to simple launchers for faster UI performance.
d. Avoid Live Wallpapers
Static wallpapers use less memory.
3. What Does *#7353 Do on Android?
The code *#7353# is a hidden test menu code used on some Android devices.
Purpose:
It opens a Quick Test Menu that allows users to check hardware components like:
- Sound
- Vibration
- Camera
- Sensors
Important Note:
- It does NOT speed up your phone
- It is mainly used for diagnostics and testing
- It may not work on all Android models
4. What Does *#9900 Do to Your Phone Android?
The code *#9900# opens a system dump menu on certain Samsung Android devices.
What it does:
- Shows system logs
- Helps identify performance issues
- Allows clearing system dump files
Can it speed up your phone?
Yes, indirectly in some cases:
- Deleting system logs can free storage
- It may slightly improve performance
Warning:
- Use carefully
- Do not change unknown settings
5. What Does *#21 Do to Your Android Phone?
The code *#21# is a call forwarding status check code.
What it does:
- Shows whether your calls, messages, or data are being forwarded
- Displays forwarding status only
Important clarification:
- It does NOT speed up your phone
- It is NOT a performance tool
- It is used for checking network settings
6. Common Reasons Why Android Phones Become Slow
a. Low Storage
When storage is almost full, system performance drops.
b. Too Many Apps Running
Background apps consume RAM.
c. Outdated Software
Old versions may contain bugs.
d. Heavy Apps and Games
High-end apps slow down low-spec devices.
e. Malware or Junk Files
Untrusted apps may harm performance.
7. Safe Ways to Maintain Android Speed
a. Keep Storage at Least 20% Free
b. Update Apps Regularly
c. Use Trusted Apps Only
d. Restart Weekly
e. Avoid Overheating
Heat slows down processors.
8. Performance Boost Checklist
Follow this quick checklist:
- ✔ Uninstall unused apps
- ✔ Clear cache
- ✔ Restart phone
- ✔ Update system
- ✔ Free storage space
- ✔ Reduce animations
- ✔ Limit background apps
9. When Should You Reset Your Phone?
If your phone is extremely slow even after optimization:
Consider Factory Reset if:
- Apps keep crashing
- Storage is corrupted
- Performance is still poor
Note: Backup your data before resetting.
10. Myth vs Reality: Android Speed Tricks
Myth:
Using secret dial codes will permanently speed up your phone.
Reality:
Most codes are for diagnostics, not performance boosting.
Myth:
More RAM always fixes slow phones instantly.
Reality:
Optimization matters more than just hardware specs.
11. Final Thoughts
A slow Android phone doesn’t always need replacement. With proper maintenance and simple optimization techniques, you can significantly improve performance.
To summarize:
- How to make a slow Android phone fast? Clean storage, reduce background apps, update software, and optimize settings.
- *What does #7353 do on Android? It opens a hardware test menu for diagnostics.
- *What does #9900 do to your phone Android? It shows system logs and can help free space on some devices.
- *What does #21 do to your Android phone? It checks call forwarding status only.
By following these steps regularly, your Android phone can stay fast, smooth, and reliable for a long time without needing expensive upgrades.
