Use APKPure App
Get Mediatek_SmartDevice_W1515MPV5 old version APK for Android
communication witch smartphone by install this apk in your phone
（1） first, install this apk in your smartPhone
（2）second, if you first install this apk, Set up some conditions according to the operation steps.
（3）third, turn on the bluetooth in your smartphone and bt dialer
（4） finally, you can start the communication.