Both my wife and I seem to be getting duplicate SMS texting errors on our SK4Gs. the same message will arrive sometimes DOZENS of times. It seems like the phone isn't sending the right signal to the T-Mobile server that the SMS Text Message has been received. (Thankfully I have an unlimited TXT plan.) I troubleshooted with on-line Chat and they said to try SIM Card in another phone at a local T-Mobile store and if the problem still happens, it is a network problem, if not, it is a Phone problem. I did. No Duplicates. Odd that when I send a text message to myself, there are no duplicates. Store Rep said next step would be a MASTER RESET of the phone before they would do a warranty exchange. Is anyone else having this issue. Any suggestions on any system tweaks that can be used to solve the issue? Since the issue statrted, I upgraded to GeekSMS and still get the same problem.