I just bought my first smart phone last week. I purchased a Droid Ultra from verizon and I looking for some app advice. Trying to find a free app for texting that helps organize my texts. I don't like the preset app that came with the phone. I also would like some advice on some basic apps and what you might consider some "MUST HAVE APPS". Should I be careful with wifi or 4G and roaming charges? If these are common questions please direct me to any existing posts. Any advice is much appreciated.