It’s more that it’s evidence that a reasonable person could doubt. It’s the prosecutors job to prove beyond a reasonable doubt. The defense needs to convince a reasonable person that you might not have done it.
If there’s other evidence phone location and activity data could be argued to be faked, but in isolation a reasonable person could doubt that someone faked their phone activity and location.

The court isn’t interested in exonerating people, it’s only interested in arguments supporting guilt and finding holes in them. It’s why they don’t find you innocent, only “not guilty”. You don’t argue that you’re innocent, you argue that the reason they say you’re guilty is full of holes.