How do I locate my lost iPhone?

If Find My was turned on, there are several reasons why you might not see a location.

• The phone might have been turned off, or run out of power.
• The phone might not have a Wi-Fi or cellular Internet connection.
• The thieves may have placed the phone in a special bag or enclosure ("Faraday cage") to cut off radio contact (Wi-Fi, BlueTooth, cellular) between the phone and the outside world.

There's little you can do other than to mark the phone as Lost, to maybe also request a remote Erase, and to keep checking. Even if you see a location, going there in person to confront criminals might not be a very safe thing to do. Some criminals would be happy to mug you or even to take your life.

You may get messages claiming to be from Apple Security, or the authorities, saying that they want to reunite you with your iPhone, and wanting you to enter your Apple ID and password, click a link, or remove the phone from the list of devices associated with your Apple ID.

These messages are not from Apple or law enforcement, but from the criminals – who want your help to clear the Activation Lock (so they can "make your phone their own"), let them ransack your data, or both. Do not bite – or respond.

I'm sorry this happened to you. Unfortunately the only advice I can offer. Is that which is listed in the link below.

If your iPhone or iPad is lost or stolen - Apple Support

Do's and Don'ts for lost iPhones - Switched Off - Offline - Beware of Phishing – Apple Community