| | Re: Shrink and Install OS for 9900
You don't need to delete the vendor.xml file(s) if the OS release is from your carrier. But it doesn't hurt (or affect) anything if you do.
If you install any device OS and if you are on a BES, you will need to reactivate the device on the BES.
If you are not on a BES, what exactly is your question regarding the need to "activate enterprise"?