My first time to use samsung, i had my phone for a yr now. Last saturday the problem started the phone lags and reboots itself i monitored it until monday and it keeps on repeating and its getting worse. So i went to samsung service center they said maybe its the mother board, so i left my phone there they said it would take 2-3 days but the next day they asked me to pick up my phone when i get there they said its just the software not the mother board so they reset everythin they even changed the battery. As i walk out of the store suddenly it reboots again so i came back but they said i have to monitor it for a while so now my phone problem got worst. I have no apps and all my files are in memory card and my memory card is not inserted but still it hangs. When i try to turn on theres a picture appearing and it says "downloading dont turn off target" it been like thAt for hours already. I hate samsung!!!! Never again!!