Blinking red light and phone not turning on or charging when plugged in might be fixed by holding down all three back buttons at the same time for 15 seconds or so, I dont know how but it worked on mine! Also, leaving it plugged in for a few hours can fix it. Mine turned off and wouldn't make it past unlock screen for more than a second or so then eventually stopped getting past ATT logo. I baked my motherboard in the oven at 325 for 8 minutes and now it works. i have a bleached screen im not sure from what and SIM card is detected but no mobile network and have no idea how to fix, please help! i have a parts phone bought to fix an unresponsive digitizer, but been too scared to switch out digitizers so i pulled the cover off both phones (both were complete phones with charged batteries) and (painstakingly!!) connected the digitizer to the other phone and used the touchscreen from the other phone while looking at the working phone!