mobile

Hello, I recently got a Galaxy S5 the GM-900v and I want to update to lollipop but I cannot it will install the update when my phone is on but when it starts to reboot it will get about 1/4th of the way through on the download bar and it will fail and restart my phone and when my phone turns back on it says "There was an error installing the update. I have searched and searched and tried do loading it at least 10 times. If anyone can give me help I would greatly appreciate it!