When network problems prevent or interrupt a license check, the Google Play client notifies the application by returning a RETRY response code to the Policy's processServerResponse() method. In the case of system problems, such as when the application is unable to bind with Google Play's ILicensingService implementation, the LicenseChecker library itself calls the Policy processServerResonse() method with a RETRY response code. In general, the RETRY response code is a signal to the application that an error has occurred that has prevented a license check from completing.