MFC-7840W FAQs & Troubleshooting MFC-7840W Not your product? Sort by: Updated Date Popularity 2 Results 1. 10/30/2019 Unable to print or scan when using Brother iPrint&Scan from my Windows Phone® mobile device. 2. 03/25/2016 Unable to print or scan when using Brother iPrint&Scan from my Android™ mobile device. Print FAQs & Troubleshooting