Phone theft. I want to block my apple ID, and before that, see the geolocation of a stolen phone.

Did you enable Find My?

1. If your iPhone, iPad, or iPod touch is lost or stolen - Apple ...
2. Find the serial number or IMEI on your iPhone, iPad, or iPod ... You cannot track using iMEI number. but you may need it so keep it handy

If you didn't turn on Find My [device] before your device was lost or stolen, it can't be used to locate your device. Change your Apple ID password. Change the passwords for other internet accounts on your device. This can include email accounts, Facebook, or Twitter etc...

Don'ts

If you remove the device from your account after you erase it, Activation Lock will be turned off. This allows another person to turn on and use your device.

Do's

• Mark As Lost.
• Erase your device.
• Apple Care+ :- file a claim for your lost or stolen iPhone. (If you had Find My enabled)

You can track an iPhone by going to https://icloud.com/find and an authentication code will not be required. You can do that, then put the phone in lost mode and either lock it permanently or erase it. As long as you never remove it from your Apple ID account it can never be used.

And you can then use the same Apple ID on a new phone. By creating a new Apple ID it means that you will have to repurchase all of your apps and music.

You had a Face ID and passcode on the device and no one can get into it.

A 7 doesn't have Face ID.

None of that is true.

That is completely true. iPhones with a passcode have never been hacked. And if they don't have a passcode they can't have an Apple wallet. Stop making this stuff up.