No, Apple doesn't directly "blacklist" a stolen iPhone to prevent network use, but they provide powerful tools like Lost Mode and Activation Lock to lock the device and protect your data, making it useless to thieves. The wireless carrier is responsible for blocking the phone's IMEI (network access), while Apple's features secure the device and your account, preventing activation without your Apple ID password, notes this Quora post and this Orchard article.
You can use Stolen Device Protection to protect against the rare instance when someone has stolen your iPhone and knows your passcode. Stolen Device Protection prevents the person from performing critical device and Apple Account operations (like changing your device passcode or Apple Account password).
If you lose your Apple device, a personal item connected to an AirTag, or another type of Find My network accessory, you can use Find My to locate it, mark it as lost to protect your device and personal information, or erase it if you believe it's permanently lost or stolen.
You might think that Apple has the power to blacklist an iPhone, but it's actually only the wireless carriers that are responsible for blacklisting a device. Apple cannot change the status of a blacklisted iPhone, in fact they have a hands off policy for any devices that may have been stolen.
You should tell your network provider straight away if your phone is lost or stolen, so they can block it and stop anyone else using it.
You can you mark your device as lost and remotely lock it with a passcode. This keeps your information secure and disables Apple Pay on the missing device. You can also display a custom message with your contact information on the missing device.
It's locked with your device passcode. Payments cards and passes that you use with Apple Pay are suspended. If you use Stolen Device Protection for iPhone, Face ID or Touch ID is required to turn off Lost Mode — so even if a person has your iPhone and knows your passcode, they'll still be locked out of your device.
Network operators can prevent stolen devices from connecting to their services by blacklisting the device's IMEI number.
4 Ways to Verify if a Used iPhone is Blacklisted or Not
Three-finger gestures on iPhone primarily activate accessibility features like VoiceOver (for screen reading and navigation) and Zoom (magnification), allowing scrolling, zooming, and text manipulation (copy/paste/undo) with specific taps and drags, though some text actions work without VoiceOver enabled for quick editing. Common gestures include three-finger double-tap to toggle VoiceOver speech, triple-tap for the screen curtain, and pinching/spreading with three fingers for copy/paste actions, notes this YouTube video.
*3001#12345#* on an iPhone activates the hidden Field Test Mode, a diagnostic tool for network engineers and power users to see detailed cellular data like signal strength (dBm), cell tower info, and network quality, accessible by dialing the code in the Phone app and pressing call, often after turning off Wi-Fi for accurate cellular readings.
1 & 2, in theory, if 'Find my iPhone' is enabled, it can assist the police to recover a stolen phone, however, location accuracy is not totally effective and this is because in built-up areas such as London, a stolen phone could be shown as being at a particular location but in reality, that location could cover a ...
Contact Your Carrier
Next, reach out to your mobile carrier and report your phone as stolen. They can block your stolen phone from their network, preventing the thief from using it with a new SIM card. You'll need to provide your account information and your phone's IMEI number.
AppleCare+ with Theft and Loss includes coverage if your iPhone is lost or stolen, up to two times every year. And AppleCare One includes coverage if your iPhone, iPad or Apple Watch is lost or stolen, up to three times every year. Each incident is subject to a deductible, and taxes may apply.
Remotely erase your device or a family member's device
Lost Mode allows you to lock your iPhone, iPad, Mac or Apple Watch so that others can't access your personal information. You can turn on Lost Mode in Find Devices on iCloud.com.
Even if you think you may have only lost the device, you should remotely lock it to be safe. If the device was stolen, immediately report the theft to the police, including the make and model, serial and IMEI or MEID or ESN number.
How to remotely erase your iPhone
You can also call your network if your phone is nabbed and tell them your IMEI number so they can block (blacklist) your phone to stop it from connecting to any network.
How to blacklist your phone
If they gain access to a lost phone, criminals can carry out numerous attacks and crimes, such as: Stealing money from bank accounts linked to the phone. Make unauthorized purchases using credit cards stored in the phone's wallet. Access any stored login credentials for accounts.
If the phone was reported lost or stolen then the phone is blocked and basically a brick and unable to use on another carrier. The right thing to do is back up your data if there are any and then return it to the insurance company.
Use the Find My app
Open the app on another device that's signed in to your Apple ID, like a computer or iPad®. Select the Devices tab (you should see a list of devices), then select the name of the lost phone. Your phone's last known location should appear.