I've noticed the wifi strength in the notification isn't always accurate. Most times it will indicate that I do not have a signal when, in fact, I do. You can see in the screenshot that the download speeds are fine, and everything works as it should but the wifi signal definitely shows that it's weak. This was while sitting right next to my router. Also, my laptop and ipad show full signal strength in the same location. I get a full bars sometimes, usually only for a few minutes when I restart the device. This is a rooted razr hd running jelly bean, btw. It's not a big deal to me, but it is a minor annoyance and I'm curious to see if it happens to anyone else.