Can LEOS obtain information from Cell Phones independent of Carriers?
If they can , so can Google.
Given current pending issues with Google, I don’t trust anything google offers in products or software.
LEOs could issue a warrant to the carrier to get information on what was sent to and from your phone, and who called you. They can do that for any phone line, any time.
About accessing the phone, that’s an interesting question! If you own the phone, they would have to get a warrant to examine it. But if it’s a subsidized phone, the question is do you own it outright until the 2 year or whatever contract is up? If yes, then the LEO still has to get a warrant to access your cell phone. If no, then they could - I think - just get a warrant with your carrier and access your phone.
Interesting question!