Tommie's Cell

For all of you who, like myself, did not know that Tommie lost his cell phone:

Tommie has received a new cell phone, cell phone carrier, and new number. To obtain his new number, take his old number and do the following to each number:
-4, -8, +4, -1, +5, +3, +0, -1, +7, -1

He would like to build his phone book back up. It sounds like the only way he plans to do this is by saving numbers that call him. So, ya. Give him a call.