Nowadays, the speed of changing smartphones is really fast. A bunch of old mobile phones are eliminated and given away at home, and others may not be worthy; It's a pity to sell second-hand. So, what should I do with the old mobile phone? There is a famous saying: life lies in tossing. In fact, as long as you use your brain a little, old mobile phones can turn waste into treasure.

1, as a monitor at home. Nowadays, many families, whether they have children or not, are willing to install cameras at home, especially on holidays. When there is no one at home, installing a monitor is literally thousands. In fact, we can use the replaced mobile phone as a monitor and put it at home. There are many corresponding apps installed in the market, which can be used as monitors after installation, but there is a big drawback that they basically don't work when the light is insufficient at night.

2. Car navigator. At present, the screens of eliminated smartphones are basically more than 4 inches, and generally have GPS function. As long as a navigation application software is installed in the mobile phone, plus the car bracket and data cable, a car navigator can be formed, and the money for buying a car navigator is also saved!

3. Keep it as a souvenir. If there is something wrong with the phone, such as a broken screen, it is of little value to realize it. If you want to throw the trash can, you can keep it as a souvenir. When you are old, you can also show your children the mobile phones we used to use.

4. Baby's toys. Friends who have a baby at home can install some applications suitable for baby entertainment in the old mobile phone for the baby to play, which not only saves the money for buying a tablet, but also allows the child to play with confidence and boldness without worrying about how to fall.