Entry #152 looks the best. I don't know if it is because of the black background, but it pops the most. THe color blue used in this entry is the best color blue you used.
Maybe you could keep #152 the way it is, show me what it looks like on a white background? and design that shirt into a square like you have been doing. This is important because we will need an APP LOGO.
Entry #160 has a good idea. I like the secondary color for the "wireless waves". But i prefer the layout in either #149 or #158. Maybe we can work this into the better layouts. Also in terms of the color blue in #158, id like to see just a littttle darker.