1. S
   1. SECURITY
      1. Sensitive data
      2. Permission logs
      3. Insecure data storage
      4. SQL Injection
2. U
   1. USER INTERFACE
      1. Style
         1. Fonts on different pages
         2. Colors
         3. Text boxes
         4. Icons
         5. Symbols
         6. Links
      2. Positions
         1. Alignments
      3. Consistency and standards in app
3. D
   1. DATA
      1. Files uploading
         1. Different types of files
         2. Different size of files
      2. Media files
         1. Image
         2. Audio
         3. Video
      3. Special / Invalid characters
      4. Text/Alphanumeric
4. N
   1. NOTIFICATION
      1. Popup
      2. Enable/disable
      3. Hardware connections
         1. Headphones
         2. Memory card
         3. USB
      4. Battery notifications
         1. High
         2. Low
      5. Notification by other apps
      6. Sound , Vibration
      7. Alarms
         1. Clock
         2. Calender
5. I
   1. INTERUPTIONS
      1. Phone calls
         1. Receive when app is open or when any action is performed
         2. Reject call
         3. On hold
         4. End Call
      2. Email
         1. When Receive the email
         2. When open an email
      3. Messages
         1. Text Message
         2. Voice messages
         3. Video Messages
         4. Instant messages
            1. Facebook
            2. Whats up
            3. Skype
      4. Video Calling
6. F
   1. FUNCTIONALITY
      1. Sign in
         1. Social media
         2. Direct sign in
         3. Should match password criteria
      2. Login
         1. user name and password mandatory
         2. Forgot password option
      3. Logout
      4. Settings
      5. Edit and update
      6. Save/cancel
      7. Install/Launch
         1. Install
         2. Uninstall
         3. Restart
         4. Exit
         5. Turn on/Off phone
      8. Text fields
         1. Case sensitive
         2. Clear fields
         3. Switch from alpha to numeric mode
         4. What characters are allowed
         5. Boundary value
            1. Maximum length allowed
            2. Minimum length allowed
         6. Copy/paste of text
         7. Drag and drop of text
         8. Cursor displaying while typing
         9. Number fields allow only numbers
7. P
   1. PLATFORM & DEVICES
      1. Mobile Devices
         1. Samsung A8
         2. Motorola Xplay
         3. Nexus 5
         4. Samsung Tab A
      2. Versions
         1. Marshmallow
         2. Lollipop
         3. KitKat
8. L
   1. LOCATION
      1. Fake GPS
      2. Moving a round difference places
      3. Lose connection
9. U
   1. USABILITY
      1. Orientation
         1. Landscape mode
         2. Portrait mode
      2. Clear Content
      3. Graphics / Layout
      4. Navigation
      5. Label/buttons
      6. Error messages/confirmation messages
      7. Search
      8. Readability of text
10. G
    1. GESTURES
       1. Touch and hold
          1. Cut
          2. Copy
          3. Paste
       2. Spread
       3. Scroll
          1. UP & Down
          2. Left & Right
          3. Continuous Scroll
       4. Pinch
       5. Shake
       6. Multi touch
       7. Tap
          1. Single Tap
          2. Double Tap
          3. Multiple /Continuous Tap
       8. Pattern
          1. Left Arrow
          2. Right Arrow
       9. Swipe
          1. Right
          2. Left
       10. Flick
       11. Keypad
       12. Stylus input
11. N
    1. NETWORK
       1. Mobile data
          1. 2G
          2. 3G
          3. 4G
       2. WIFI
          1. Check with Wifi
          2. Without wifi
          3. Multiple Wifi
          4. Switching Wifi
       3. Deadspot/No Network
       4. Flight mode