Like thousands of others, my phone locks up multiple times each day. It is a refurb, as my original had to be replaced due to damage. It appears the only "solution" is to have it replaced. My question is, with what? My first one never did this once. This one does it 2 to 4x a day, every day, no lie. What batch should I look for? How do I know the next one won't be the same?