I recommend three ways to get this beast under control:

1. Establish a strong corporate policy for mobility with automated enforcement. The key here is not only top-down support of the policy, but a formal (meaning documented and publicized) policy that assigns service plans/devices by job roles, and defines consumption / usage rules. I’d also recommend a procurement portal to automate enforcement for acquisition, upgrades, and deactivation.
2. Manage employees’ plans to save money. Sounds easy when I say it like that, huh? But to be serious, this requires a structured, automated approach. You absolutely need software that monitors wireless plans / consumption for you. Also, you do need to do a little work to get the biggest bang for your buck from providers. Get in touch with someone here at Telesoft about how to pool users, optimize service plans, negotiate better rates, etc.
3. Automate invoice management, validation, and reporting. These tasks are incredibly labor intensive and there’s no reason to keep doing them manually! Automate to avoid billing errors, human errors, late payment penalties, as well as automate reconciliation of billing with inventory, automatically manage chargebacks, and fully meet tax compliance requirements.

If you follow my guidelines and implement a wireless expense management program, I predict you save at least 5%, but maybe as high as 35% of your total telecommunications expenses. I look forward to hearing your individual feedback and results.