I live in San Diego and I have great 4G signal all over town except a few dead spots here and there but not enough to worry about. Im more so perplexed about my wifi strength then cell signal. I can sit outside on my patio listening to Pandora on my phone without the case and the signal is great. If I put the case on. signal either disappears completely or signal goes down to one bar. Same thing happens at work, and both places have the wifi router no further then 20 to 25 feet. Very weird that a piece of plastic can cause this...