Help Converting User app to System app.

[Aelliaria]

Hi guys!

I need your help!

I wanna convert my app FakeGPS (paid version) to an system app.
I tried using apps like system app mover, and ES File Explorer, Link2SD, ect. (yes my phone is rooted and i have a Samsung Galaxy S6 (SM-G920F with an built-in battery))
but every time I try to convert the app and restart my phone the app is disappeared, and I have tried couple of times.

Sorry for the English it's not my home language.

Thanks in advance!

 

[Fox Mulder]

Titanium Backup should be able to do this.