Why are there so many spam messages harassing the phone?

In fact, as a person who knows a little about digital, mobile phone and communication.

I think there are too many harassing phone calls and text messages. At present, it is not effective to rely solely on the anti-harassment and shielding of operators.

At present, most people should have two cards like me.

A card is the one you used earlier, and it has been used for many years. The registered APP is also registered, and the downloaded software has been downloaded enough.

In short, you have used this card to experience people who want verification code and mobile phone number.

Then one day, you think it's disturbing too many phone calls and spam messages.

At this time, get a new card.

In the future, this new card will be your main card, the old card. Find an old mobile phone, plug it in and reserve it every day.

This is what I am doing now. Old card has about 5 harassing calls every day, and text messages are also annoying.

However, it is unlikely that the new card will be harassed. At present, the new card has been used for about 3 years, and only received sporadic strange calls.

Software registered in the future will also receive the verification code with the old card to keep the new card quiet.

As for the old mobile phone, you can put it in a place where you can find it quickly when you need to get the verification code.