Mvvm light servicelocator

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MVVM

I have been looking at the few samples available for MVVMLight. I have seen them use the Microsoft ServiceLocator, but when I search for it, I discover that it is obsolete. This was uses with the MVVMLight SimpleIOC. I have seen the following:

ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);

I have seen a few sample of using SimpleIoc on its own. I think this is what I should do, and I can do away with the ServiceLocator. Are there any recommendations on how I should use the SimpleIoc in my project

What I have tried:

I have tried to looked up ServiceLocator on the internet