I have a samsung galaxy s3 mini. I was just in the middle of texting my friend when it suddenly froze and it wouldn't show any kind of reaction when I tried to type or press any buttons. I then took out the battery after about 5 minutes of waiting, as I saw no other way to turn it off and now it won't turn on anymore. I already changed the battery and my old battery works completely fine in my mum's phone... Please help?