how do i make my phone look for a slave?
To a certain extent that depends on the type of phone you are using. Sadly Apple continues not to allow the use of Serial Bluetooth devices on the I-Phone and I-Pad but pretty much all android phones and tablets have built in support for the function.
I personally recommend the Bluterm app for connecting to your device. Once you have installed the app you should be able to pair with the device by looking for a device named “Linvor”.I hope that helped, let me know if you still have any trouble.