When i go to buy Poweramp on google play, If i have registration problems can i get help here with them? As i seen in the google play comments people was having them. Also my phone is not rooted how will i be able to back up Poweramp if i decided to use a v3 version. Will the uni v2 versions work with the google play unlocker? Also what V3 version can i use that has the most features to date?