Hipstreet Phantom 2 keeps rebooting

Hi All,

I have inherited a hipstreet phantom 2 from my mother in law which we bought her a year ago. She never used it and when I first turned it on I went through all the welcome screens.

However, I am trying to use it and it keeps restarting itself. At first it was having issues with updating Google play services which I thought was causing it, but I have factory reset and now that problem seems to be solved. But it keeps struggling with just opening menu's and reboots itself every 5mins!

Any thoughts??