Becareful what you download now. There is a new trojan that will encrypt all your data on your phone and lock it as well. Then you have to call a number to pay the ransom!!!! Just like the one going around on Windows PC's. Here is the link about the article on Tom's. http://www.tomsguide.com/us/simplocker-android-first-crypto-ransomware,news-18922.html#simplocker-android-first-crypto-ransomware%2Cnews-18922.html?&_suid=140233252996607300541151598242