Smoke alarm SMS

If we can solve the idle problem of a large number of old mobile phones, we can not only make full use of old mobile phones, but also avoid personal privacy leakage, so that we can have the best of both worlds and have a new trick to turn waste into treasure.

Become a remote control

The old mobile phone itself supports infrared emission. You can download a remote control APP directly, turn your mobile phone into a remote control, and support infrared remote control devices, such as TV sets and set-top boxes.

Become a navigator

Nowadays, smartphones support navigation, and the original car navigation update is not timely. It's convenient and easy to use an old mobile phone for car navigation.

Turn into a camera

Second-hand mobile phones can be used to monitor the situation at home, check children and pets and prevent accidents. If there is an idle smartphone at home, it can be used for remote monitoring.

Intelligent smog

We can change an old smart phone that has fallen into dust into an intelligent smoke alarm. Both iPhone and Android smartphones have related apps, which can perfectly realize this function. When there is smoke at home, your old mobile phone will send you a message to inform you of the corresponding danger, which is completely free. Remember to connect the power supply.

Bluetooth slave machine

After the Bluetooth docking of two mobile phones is successful, your old mobile phone will be transformed, and calls, text messages or pushes of commonly used mobile phones can be realized on the old mobile phone. According to my actual measurement, it is effective within the available distance of 10 meter, which is very convenient.

Variable microcomputer

Install a Linux operating system, Debian, and it's done. Routine computer work can be done. Of course, don't try LOL and Dota. You still have a real computer, haha.

Variable set-top box

You can use an old mobile phone as a set-top box.