Please go to "settings" -> "Use Side Switch to" and select mute, then switch the button on the side to unmute. When a BabyBus app has no sound on an Apple iPhone or iTouch device: Please switch the button on the side to mute and then unmute.
Please understand that jailbroken phones may be unstable. See if IAPFree is installed on your device. If yes, please unstall it through Cydia.
A. Hold and drag the app icon to the delete box.
B. Go to "settings" -> "Apps" then find the app and tap "uninstall."
C. Use a device manager on your PC and select unstall when your device is connected.
A. Press and hold the app icon on the home screen until all the icons appear shaking, then tap the "x" button on the app you wish to delete.
B. Connect your device to iTunes on PC or Mac to delete an app in app manager.
C. Connect your device to iTools on PC or Mac to delete an app in app manager.
Please note that the default Android app installation is through your phone's internal storage, and below are methods of installing or transferring it to your SD card：
A.Transferring: Go to "Settings" -> "Apps" -> "App Management" then find the app you want to transfer and select "Transfer to SD card" (Apps must be transferred manually).
B.Use an app manager while connecting your device to your PC, then before installing, go to settings and set default installation to SD card.
You have too many apps running or you have insufficient storage, please close the unused apps or clear your phone memory.