If you have an iPhone or iPad and you want to know the location of your spouse’s Sim Card (or other device), you can use a third-party app like Find My Mobile . It will give you the GPS coordinates of your device and also cache the data for 2 days. The only catch is that it does not work in China so if you need to show it to your spouse, you will have to travel there in person (and possibly wait for an open slot). If you want it to work in China, you can use the following workaround that works with the free version of Find My Mobile . You need to enter the code “xxx” into the QR code reader app on your iPhone or iPad. If you want even more information, open the
page and find out all the details.