What is Mobile Expense Management? Mobile Expenses management or MEM is known as WirelessExpense Management and Optimization in Wikipedia. Wikepedia describes Wireless Expense Management and Optimization as "Corporations need to be able to focus on their core business, the larger the business the more there is to handle on a day-to-day basis. And businesses with a large mobile / cellular / wireless presence also have the expenses associated with them. These companies need professional Telecom Expense Management (TEM) to help them manage their wireless telecom bills accurately and effectively. For a business already under pressure from their primary business obligations tasking an accounts payable department with tracking the ever-changing wireless technologies and changing General Ledger (GL), codes from acquisitions and mergers can be overwhelming and are not qualified to track what they need to look for to make sure that telecom bills are ...