User blog comment:Thistle Whistle/I lost my save!/@comment-4009269-20160423181618/@comment-4009269-20160425010020

You'll have to find in Google a pp.dat (the save file) for your current version of the game. The location on your SD card to put it in should be /Android/data/com.ea.game.pvz2_(na or row depending on where you live)/files/No_Backup/.