"Why does my printer suddenly says the toner is not compatible?"に関する回答The printer that is refusing to accept it is at a higher Samsung software revision level than the printer that accepts it. Because Samsung apparently under took this intentionally, I acquired a Xerox printer to be my longer term solution. I will use the Samsung printer only until the toner that I now have, runs out. I had to throw away A couple $100 worth of toner because of this software upgrade.