MMSService.Error.unknown An unknown problem caused the error. Declarationcase unknown See AlsoIdentifying errorsMMSService.Error.notSupportedMMSService.Error.invalidRecipientMMSService.Error.invalidMessagePartsMMSService.Error.internalErrorMMSService.Error.mmsNotReadyMMSService.Error.mmsNotConfiguredForCarrierMMSService.Error.maximumSizeExceeded