Khám phá những tính năng bí mật của Android:
**🔓 DEVELOPER OPTIONS TRICKS:**
**Enable Developer:**
Settings → About → Tap Build Number 7x
**Must-try features:**
1. **Animation scale 0.5x**: Nhanh gấp đôi
2. **Force 4x MSAA**: Gaming graphics better
3. **Show taps**: Record screen visible
4. **Stay awake**: Screen on when charging
5. **USB debugging**: ADB commands
**📱 HIDDEN GESTURES:**
1. **Double tap status bar**: Scroll to top
2. **Long press WiFi/Bluetooth**: Direct settings
3. **Swipe notification twice**: Expand fully
4. **Volume + Power**: Screenshot
5. **Power button double tap**: Camera
6. **Three finger swipe**: Screenshot
7. **Pinch home screen**: Overview
8. **Swipe down fingerprint**: Notification
9. **Double tap overview**: Last app
10. **Long press recent**: Split screen
**🔤 KEYBOARD TRICKS:**
**Gboard secrets:**
1. **Space bar swipe**: Move cursor
2. **Hold space**: Language switch
3. **Double space**: Period
4. **Swipe from ?123**: Quick number
5. **Long press period**: Symbols
6. **Pinch/zoom**: One hand mode
7. **Long press enter**: Search
8. **Clipboard manager**: Built-in
9. **Floating keyboard**: Drag handle
10. **Text shortcuts**: Settings
**🎯 QUICK SETTINGS:**
1. **Long press tiles**: Direct settings
2. **Edit tiles**: Pull down → Edit
3. **Auto-rotate toggle**: Portrait lock
4. **Invert colors**: Accessibility
5. **Caffeine tile**: Screen awake
6. **System UI tuner**: Hidden menu
7. **Demo mode**: Clean screenshots
8. **Sensors off**: Privacy mode
**📞 DIALER CODES:**
- *#06# - IMEI number
- *#*#4636#*#* - Testing menu
- *#*#7780#*#* - Factory reset
- *#*#197328640#*#* - Service mode
- *#*#273282*255*663282*#*#* - File backup
- *#*#34971539#*#* - Camera info
- *#*#2663#*#* - Touch version
- *#*#759#*#* - Google Partner setup
**🔋 BATTERY SECRETS:**
1. Adaptive battery learning
2. Battery share reverse
3. Extreme battery saver
4. App standby buckets
5. Background check apps
**🌐 CHROME TRICKS:**
1. **Pull down**: Refresh
2. **Swipe address bar**: Switch tabs
3. **Long press back**: History
4. **chrome://flags**: Experiments
5. **Desktop mode**: Menu option
**📁 FILES TRICKS:**
1. **.nomedia file**: Hide folders
2. **ZIP without app**: Built-in
3. **Nearby Share**: AirDrop alternative
4. **Files Go**: Google cleaner
5. **Secure Folder**: Samsung
**🔐 PRIVACY HIDDEN:**
1. **Permission manager**: Control all
2. **Privacy dashboard**: Android 12+
3. **Mic/Camera indicators**: Status bar
4. **One-time permissions**: Auto revoke
5. **Approximate location**: Not exact
**⚡ BONUS TRICKS:**
1. **Guest mode**: Temporary profile
2. **Screen pinning**: Lock one app
3. **Magnification**: Triple tap
4. **Color inversion**: Accessibility
5. **TalkBack**: Screen reader