I have a China Unicom in my phone currently (as a second SIM, but I might now take it out) and haven't had any problems with Google Maps. When I was in China in June I was using Google Maps via VPN. This doesn't mean much of course as things can move pretty quickly. I also didn't realise a SIM card's capabilities.
One of the bug commenters said that "neither reviews nor photos" could be seen and believes that it was because "I once used this app in China" but does not explicitly mention swapping out the SIM card.<p>my question: does a visitor to China have to swap out the SIM card in their phone in order to use it there?
Somewhat related: I was in China recently, and bought a SIM at the airport. You know those arrows on the mobile data icon in the notification bar on Android that tell you whether your device is actively transferring data? The upload arrow was on non-stop, the entire time I was there. I still have no clue what it was doing.