Apple lost its mobile phone. When logging in its ID, you will be prompted that the ID has been locked. You must send a text message to confirm this. How can I get it back?

How to find the lost Apple phone: First, open it and find my iPhone. 1, iOS 10.3 and above: Go to Settings -Apple ID You may need to enter your Apple ID and password to log in -iCloud scrolls to the bottom of the screen-find my iPhone, click it to find my iPhone and send the last location. 2.iOS5 to iOS 10.2. 1: enter the settings -iCloud. You may need to enter your Apple ID and password to log in-find my iPhone. Tap to find my iPhone and send the last location. Second, use it to find my iPhone. 1. Log in to the website/through the browser, enter the Apple ID used by the lost iPhone, and enter the location of "Find My iPhone". 2. Install Find iPhone on other iOS devices, and then log in to Apple ID to locate it. You can do the following to find my iPhone: 1. Check the current battery charge. 2. Play the ringtone (it is also forced to play when the device is silent). 3. Lost mode. 4. Erase the iPhone. Note: 1. When using Find My iPhone, before locating the device, you must confirm that the device is turned on, networked and the GPS signal is good. 2. You must log in with the Apple ID registered in iCloud and find the iPhone to locate it. 3. After the 3.iPhone is lost, Apple will not inform you to verify the Apple ID and password by SMS or email. Please don't be deceived.