I have a Galaxy S3 LTE from T-Mobile (SGH-T999L) and I rooted it and tried to install a custom rom. However it didn't work and then I installed the stock rom. Now I want to reset the restore counter. With the Triangle Away. However, I though it needs root. So I don't want to root it and then reset the counter. Basically can someone just help me completely restore it to stock so there are no signs of rooting or modding. I need to send it to samsung. Please help!