"phone constantly shutting off when using the camera"に関する回答could be a bad app or camera mech issue. first, delete the apps that could be the problem. if that doesnt work do a factory reset.
"My phone keeps turning off"に関する回答Replace the Battery. probably has the original battery. if it hasn’t been dropped or water damaged. start there.
"My galaxy note4 is completwly unresponsive...Help"に関する回答if it hasnt been dropped or water damaged, First check the Battery. Replace. Im thinking its the original battery that came with phone or an old replacement battery. start here