Apple has created a tool to check a phone's Activation Lock status to ensure that you're not buying a stolen device and that the phone you're getting can be activated....
In order to check a phone's status, you'll need to have its IMEI (International Mobile Station Equipment Identity - basically a unique identifier assigned to every phone) or Serial Number. To get those:
- Tap the Settings app
- Tap General
- Tap About
- Scroll towards the bottom of the screen and you'll find both numbers
When you've got one or both of those numbers:
- Go to Apple's Activation Lock Status website
- Type the IMEI or Serial Number into the box
- Enter the CAPTCHA code displayed
- Click Continue.
The next screen will tell you whether the iPhone has its Activation Lock feature enabled.
What the Results Mean:
If Activation Lock is turned off, you're in the clear. If Activation Lock is on, though, a couple of things may be going on:
The Phone Is Stolen — An iPhone being sold with Activation Lock still enabled could mean that the device is stolen since a thief probably won't be able to disable Activation Lock. Ask the seller to disable the feature and check again. If they refuse or can't do it, don't buy that phone.
The Seller Forgot to Turn Off Activation Lock — I t's possible that an honest seller has forgotten to turn off Activation Lock. Ask them to disable the feature. If they do, you're OK to buy.
When buying a used iPhone, make sure to ask for the IMEI or Serial Number before you buy and use this tool to check the device's status. It will save you money and frustration.
- This tool isn't connected to any police systems, so it doesn't cross-reference police reports of stolen devices. This checks Activation Lock status only.
- Since Activation Lock was introduced in iOS 7, if the device you're buying is running iOS 6 or lower (unlikely these days, but not impossible) the tool can't help you.
- While pretty unlikely, it's technically possible that a thief could have access to the Apple ID and password associated with the stolen phone they're selling. In that case, the thief can remove Activation Lock and sell a stolen phone without the tool being able to help you. (с) источник