For convenient navigation in the gadget and comfortable use, it is necessary to study what the icons on the phone mean. Icons in the top tray of the display indicate the status of the device and the work of applications in the background. Monitoring their activity will help identify the causes of connectivity problems, slow loading of pages, poor hearing, etc. The ones you posted don't fit the style. I learned on the android blog that there are specific rules for a user to understand what icon they are using. No offense, but your icons aren't that comfortable.