A what catalog? If that was your reaction when you read this article’s title, mission accomplished! All joking aside, if you have been around Samsung devices for long enough, you will have undoubtedly heard about the EFS folder. This is a “magical” place that stores virtually anything that is required by your phone to work properly, including but not limited to your IMEI (or MEID/pESN if you have a CDMA device), carrier label, parameters of all sorts, and much more. All these important things are stored in different locations in that folder, particularly located in a folder in the EFS directory called NV_Items. Each item/location holds hex values for all the aforementioned parameters. As stated, this is very important information because without it, your phone simply would not work.
The NV folder is well protected to prevent people from messing with it. However, there are several ways to actually open it up, grab these items, and change them around. The question becomes though, if you are looking for something specific, where do you find it? There are literally hundreds of items to go through and several of these can be misleading due to having very similar descriptions (normally, these descriptions are picked up and displayed by programs such as DFS, QXDM, and QPST, among others). XDA Forum Member autoprime has posted a very complete and up to date list of all the NV items and their respective description for Qualcomm-based Samsung devices. So, if you were thinking about diving in this interesting folder, at least now you have a life vest to put on before going in.
Remember that this is only a reference. If you do not know what you are doing with your device, we strongly suggest that you stay away from messing with any of these parameters, as you can render your device useless. And if you are going to dive in, always remember: Back things up before proceeding.
Here is a list of all current NV items according to Qualcomm. List is current as of summer 2012. You won’t find a more complete list unless you work for Qualcomm. And if you do you should be helping us
You can find more information in the original thread.
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