Mobile Device Theft Deterrence Act of 2013 - Amends the federal criminal code to prohibit knowingly: (1) removing, obliterating, tampering with, or altering a mobile device identification number; or (2) using, producing, trafficking in, having control or custody of, or possessing hardware or software, knowing it has been configured to engage in such conduct.
Exempts the manufacturer of a mobile device, a person that engineers, tests, repairs, or refurbishes a mobile device, or a person that implements technologies for the purpose of protecting the security and privacy of mobile device end users while allowing the transmission of the mobile device identification number to service providers, unless such manufacturer or person knows that the mobile device or part involved is stolen.