I have install ARCGIS ESRI on my Iphone. Is there a manual or steps on how to use it ? I want to know how to use it. HELP !
Are you referring to the ArcGIS Online app that is available from the App Store or are you trying to install ArcGIS (the software suite) on your iPhone? The app is very easy to install, just download it and enter your username and password for arcGIS online. I am not aware of any way to install something like the ArcGIS software suite onto an iOS device.
The arcGIS app from iTunes links to your ArcGIS online account and can be used with maps that you have built and published from arcGIS desktop. Check out resources.arcgis.com/en/tutorials for some good tutorials that should get you started.