Section 4B: Terms & Conditions / Warranty 175in our invoicing records. Written notice is effective three days after deposit in theU.S. mail, postage prepaid, and properly addressed. Unless required by thisAgreement or Applicable Laws, (1) you may notify us by calling PCS CustomerService Solutions, and (2) we may notify you by leaving a message for you on yourPCS Phone, answering machine or with your answering service. Notice addressesmay be changed by giving notice as provided in this section.Choice of Law; Jurisdiction. This Agreement is governed by and must be construedunder federal law and the laws of the State of Kansas, without regard to choice oflaw principles.General. If either of us does not enforce any right or remedy available under thisAgreement, that failure is not a waiver of the right or remedy for any other breach orfailure by the other party. Our waiver of any requirement in any one instance is not ageneral waiver of that requirement and does not amend this Agreement. ThisAgreement is subject to any applicable federal and state law (collectively,“Applicable Laws”). If any part of this Agreement is held invalid or unenforceable,that part is interpreted consistent with Applicable Laws as nearly as possible toreflect the original intentions of the parties and the rest of this Agreement remainsin full force and effect. Section headings are for descriptive purposes only and arenot used to interpret this Agreement. You may not assign this Agreement to anyother person or entity without our prior written approval. This Agreement(including any referenced documents and attachments) makes up the entireagreement between you and us and replaces all prior written or spoken agreements,representations, promises or understandings between you and us. The provisions ofthis Agreement that are contemplated to be enforceable after the termination of thisAgreement survive termination of this Agreement. If there is a conflict, the ServicePlan (including any Term Service Plan) controls over the Terms.