I JUST FOUND A WAY TO TRANSFER SAVE FILE FROM ONE PHONE TO ANOTHER
if your phone have quick share (usually android phones already have this, its like the airdrop of iphone) anyway its in the control centre. So i tried to share my DT2 from my old to the new phone using quick share, just click on the app > app info > upper right (share) > Quick Share (make sure that both the old and new phone is visible to "everyone") after that wait for the transfer and done!!
your save file is saved now to the new phone!!!