Stolen iphone how to find - iPhone Apple Cell Phones

This will depend if the 'Find My iPhone App' is enabled on your phone. Here are the steps you need to take to either locate your phone or shut it down remotely -

If your iPhone iPad or iPod touch is lost or stolen

To-Do List: When your iPhone was Stolen

• Step 1: Find Lost iPhone with the Find My iPhone feature. Find the location of your iPhone and call the police.
• Step 2: Recover Data From Lost/Stolen iPhone if you can't find your iPhone for the moment (iTunes Backup or iCloud Backup)
• Step 3: Lock Your iPhone For Privacy Protection if step 1 fail.
• Step 4: Remote Erase Your iPhone For Privacy Protection if you give up finding your iPhone
• Step 5: Keep your iPhone Safe in case your iPhone get lost/stolen again
  • Backup iPhone to iCloud
  • Backup iPhone to iTunes
  • Set up Two-Factor Authentication

Learn more here:
How to Find Lost iPhone 2018 Updated DataKit

Lost iPhone How to Recover Data from Lost Stolen iPhone in 2018

if you found it for a month and didn't hand it in , it can be considered stolen
I doubt if anyone will help you with a stolen phone

It is illegal to unlock a lost or stolen phone.

Change your apple store and iTunes password.
Open your Find my Iphone app and report it stolen.
Call or go to apple store and report this stolen.

If you bought a stolen iPhone, you should bring it to the police. Maybe the device was reported stolen. If the police sees the IMEI code in their computer, they can contact the owner of the iPhone. If you payed for the phone, and you didn't know that it was stolen you didn't do anything wrong, but it is not your phone.
Maybe you don't like this answer, but it's the most fair thing to do.

Did you have Find My iPhone installed? If so, then you can track it that way and even wipe it clean remotely if you want to.

yes you can track stolen phone with IMEI number contact your service provider which you used in your stolen phone.