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Upgrade of Mobile Client Components 
This process describes the steps required to upgrade the mobile client components in a typical system landscape. You start by upgrading your development environment. Once that upgrade is completed successfully, you can begin upgrading the test and production systems. For more information, see the SAP CRM 4.0 SP06 Component Upgrade Guide in the internet at service.sap.com/crm-inst. On the left-hand side of this screen, choose Installation and Upgrade Guides ® mySAP Business Suite ® mySAP CRM ® SAP CRM 4.0. From the list of documents, choose Mobile Client 4.0 SP06 Upgrade Guide.
Hardware and software requirements for each machine are included in the upgrade guide.

See also:
Central Software Deployment Workflow