Mobile Firms Develop Scholastic Test-Prep for Cell Phones Two wireless tech firms have built a suite of wireless test preparation applications for use on cellular phones. By downloading the programs onto their cell phones, students can prep themselves on vocabulary, take quizzes, and work tutorials with practice questions, customized feedback, and exam hints. The programs -- for the Graduate Record Exams and the SATs -- were developed by Mobile-Mind Inc. and Xap Corp. based on their success with educational programs for Verizon Wireless. Those apps, as well as XapMath and XapVerbal, will now be offered to all wireless carriers.