A brand new (week old) LGOG on Sprint's network and SMS is unusable. It took a handful of calls and several hours the first day to even get SMS to work at all. What it was doing was receiving texts but could not send OR, it would get into a loop and continually send the same text over and over and over and over. A day of messing with that and we thought it was fixed. But so far on at least 2 instances texts that were received actually vanished w/o being deleted. They're gone. And now it's periodically getting into that loop again and furiously sending the same message out over and over and over. Repeated sessions with 'customer support' and innumerable updates from Sprint have only made it worse. This was a replacement on an existing account - an upgrade from an iPhone 4. So it clearly all worked fine before. At this point my only remedy is to swap it out for another phone - decidedly NOT another LGOG, maybe a Samsung or HTC or anything else, really. Or just junk the whole line and get new service from another carrier. I mean, ok, it's Sprint so no one's hoping for service in the same league as AT&T circa 1999 or anything space-age like that, but come on, can't get SMS to work? Either it's the worst phone on the planet or the worst mating of a phone and network ever.