Add successful device: PB1009

Author: jb881122

README.md

@@ -51,6 +51,7 @@ Exit value 0
 | Sony Xperia L3 | I4312 | MediaTek MT6762 | Success |
 | GIONEE S10 | GIONEE_SW17G04 | MediaTek MT6767 | Success |
 | GIONEE M7 | GIONEE_SW17G07 | MediaTek MT6758 | Success |
+| Southern Telecom PB1009 | PB1009 | MediaTek MT8167B | Success |
 
 ### Acknowledgments :handshake:
 - This app was based on [this](https://forum.xda-developers.com/android/development/amazing-temp-root-mediatek-armv8-t3922213/post82081703#post82081703) tutorial.