Why does the Nokia 7230 I just bought receive many text messages from strangers?

Happy New Year, what you said is caused by the following reasons: 1. Mobile phones have been used before. This short message was received by the "senior" and has not been deleted. In this case, you can find the seller and judge it as a "second mobile phone". 2. The text message may be sent by someone you know, and you don't have this contact in your mobile phone. This is normal! 3. Pure harassment information. Sorry, this machine has no "blacklist" function, please wait patiently!