My wifes phone bill was £20 more than usual. She has a certain amount of monthly free minutes, and also free data allowance. She is very careful not to go over these allowances, and she has been getting free music from a free app called Music Paradise. On her phone she had a message saying 'Streaming Null', but she doesn't understand it. When she clicked on it, it took her to the Music Paradise app. Could it be that after downloading a track, she is then automatically seeding it which could could use up all her data allowance?