So you got yourself a new smartphone? Awesome. But what about the old one? What do you do with it? Instead of just having it sit somewhere doing nothing, here are some useful stuff you can do with your old smartphone.

Use It As A Security Camera

If you have an old smartphone lying around doing nothing. You could use it for your safety by  turning it into a surveillance camera. There is an app on the play Store called IP Webcam that lets you do this.
To set up IP webcam on your smartphone, all you need to do is to download the app. Start IP webcam and choose your preferred resolution from the preferences. Then click on start Server. You will also have  the option to set up the server for local broadcasting or cloud streaming which lets you access your device camera from anywhere through any web browser.

Use It As A Portable Wi-Fi Hotspot

Hotpot can be more convenient than tethering because of the ability to connect wirelessly. Instead of tethering which usually needs a USB cable.

If you are planning to buy a Wi-Fi hotspot device. There might be no reason to do so if you already own an old smartphone. Almost all smartphone have an inbuilt WI-FI hotspot that lets you connect up to five devices at a time. You can connect other smartphones, computers and other wireless devices. 

To use your phone as a mobile hotspot navigate to settings > more > Tethering and Portable hotspot, and then turn on Portable Wi-Fi hotspot. Connect as many devices as your smartphone can accommodate.

Using a Wi-Fi hotspot can also help save battery life on your device since you don’t need to turn on data connection, which is a big battery drainer.

Use It As An eReader

You can easily turn your old smartphone into an eReader. eReaders are devices that lets you read electronic versions of books. An old Smartphone can act as the perfect eReader. Especially if it is a tablet device.

Using your regular phone for reading ebooks can be distracting since you can easily wonder off to something else. But using your old smartphone as a dedicated ebook reader can keep those distractions away and let you concentrate more on reading. Just make sure you uninstall all other applications that may be distracting. Some of the best apps I have found that lets you read ebooks are;
Adobe Acrobat Reader
Monn+ Reader
eReader Prestigio

Use It As A Remote Control

Smart phones with an inbuilt IR transmitter can be used as a remote control for your TV, DVD or home theater. All you need to do is install the IR Universal TV Remote app.

If you have a more modern TV with inbuilt Bluetooth and Wi-Fi, then this can be really easy because you could make use of the Bluetooth and Wi-Fi instead. Just grab Universal TV Remote Control if you TV have a Wi-Fi or Bluetooth and your phone will be a remote for your TV.

You can also use your smartphone as a wireless keyboard or mouse. By installing Telepad Remote on your phone. You will also need to install the server on your PC. You can either choose to use Bluetooth or Wi-Fi to establish connection.

Use It As A Computer

There is a lot of apps on the play Store that will let you run Linux OS on your smartphone. Some of this apps are Linux deploy, Complete Linux installer, Debian no root. Termux, userland etc. There is also this app called Bochs and it lets you run both windows and Linux OS on top of android.

Combine this with a Bluetooth mouse and keyboard and you got yourself a low End computer.

Use It For Scientific Research

If you think your old smartphone can’t be put to good use, Boy, do I have great news for you. You can help scientist find a cure to disease like AIDS, cancer, Alztymers etc. by donating you smartphone processing power to researchers. This is achieved through an open source project called BOINC.

To  contribute your old smartphone processing power to this project install and run the BOINC app, and you will find different scientific research project. you can donate your smartphone processing power to any of them.

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