First issue, I use to get all 5 bars, at any giving time I am between 1 and 3. I live in San Diego and I've used a S4 and a S3 around my house always getting near perfect reception. When I make a call, normally takes 5 to 10 seconds before it starts ringing.
Second Issue, damm thing gets warm. If I have Wifi on, the area where the camera is will start to get warm/hot. If I have it in my pocket, I will start sweating as a result of the heat.
I've used Wicked, Derthstalker, PAC, Slim, just to name a few, with same reults. Currently using Darthstalker with compulsion kerner but I am having some issues with it as others are. I am about to switch to Colonel kerner.