What the hell is wrong with cyberghost vpn

I've been using cyberghost vpn for over 2 yrs now on my pc. After a certain 3hrs it disconnects itself. That I can understand and usually switch off and turn it back on after 1hr. But on my phone it's usually a different story. You can use it for an unlimited amount on time but it usually reveals my location after some period.Can any one suggest another free vpn that I can use?