Michigan Compiled Laws, Chapter 484. Telephone, Telegraph and Radio § 484.1904

(a) The service member who is transferred, or deployed overseas, on active duty, or the service member's spouse, provides the lessor by certified mail, return receipt requested, a written notice of the service member's intention to terminate the contract, a copy of the military or gubernatorial orders transferring the service member or calling the service member to active duty, and a copy of any orders further extending the service member's period of active duty.

(b) Any wireless telecommunications equipment not owned by the service member acquired from the wireless telecommunications provider is returned to the custody or control of the wireless telecommunications provider within 30 days after the delivery of the written notice under subdivision (a).