A year later, my friend received an anti-theft message from my old mobile phone security housekeeper.

Did your mobile phone get stolen? Your friend received the text message, so you have a chance to cheat that person out. Call the police when you get out. Take your receipt and ask for your original parts. This is very important. It doesn't mean that you have a receipt to prove that the mobile phone is yours, because you may have sold it and the invoice is still there. Original factory accessories are standard, including charger, data cable and earphone.

If you can't fool that person, you can call the police directly and lock the suspect directly.

The machine can lock the brick with imei code, but you can't get it on your mobile phone. Of course, you can get it back and decode it.