I have had this phone for a while. the problems started once I switched my archaic 2gb micro sd card for a 64gb. it works fine at first, then. after a couple of weeks, strange screeching sounds will randomly appear in my music, sometime, the entire song will start to play in slow mo after hitting the sounds which is almost scary. after a while (like 5 months), the entre card will lock itself and every attempts at adding files or deleting some will say it worked but the files will disappear and reappear after one refresh. I tried reformating everything and I am at my second 64gb micro sd card doing this.