A few years ago, my DH was at a sports stadium downtown but his phone showed him in a different location. Could he have been there? Sure. He had a photo of him at the stadium, so I just have to go with the phone being wrong.
If you don't trust him and don't want to be with him then move on, easy to say I know.
If I was buying a surprise present for DH, I'd fib about where I was. Ditto if I was checking out a medical thing I didn't want him to stress about or dealing with something else worrying I wanted to get my own head around first. Sometimes I've stolen half an hour parked up somewhere to get some quiet thinking time when stuffs been hectic. Could any of that apply on a Saturday night?
Late night shopping? Harley street? Is he worried about anything?