As of late I've been finding that I get little to no service at my house, and in regular places I travel to like the city for frequent appts. The carrier I am on is Sprint, and my phone is the LG Optimus S. I cannot fix this. When it says there's no service, it typically stays like that for 4-5 hours or more. I cannot fix it by turning it off, removing card, or ripping out battery. I've had no problems with it up until late, and I am very disappointed with Sprint's service. Unless it is soon fixed, I will be switching to a new carrier immediately.