It comes and goes but I've been getting a lot of "failed" sent texts. Try to resend and most of the time it fails again. Reboot helps most about 75% of the time but that take FOREVER. Sometimes it also fails when I try to text another person after failed text to original (telling them to forward text). Some of my friends tell me they got like 3-4 of the same messages from me when i kept hitting "resend".......even though i got "failed" on my end. I use the stock text app and Whatsapp.....whatsapp doesnt have this issue. Havent tried Hancent yet. I'm running gingerbread from Kies ......was one of those who sat by the PC waiting for it to work and it finally did.