Written May 27, 2016
I’ve been experimenting with several different VPNs over the last few months and after seeing some sporadic connections overnight and periods that my phone sits for a while, I think I narrowed part of the issue to the doze feature killing it. In case you’re having the same issue, you might try this yourself.
Settings –> Battery –> (Overflow Menu) –> Battery optimization
Toggle “Not optimized to All apps”. Find the app you want to whitelist, tap it and then choose “Don’t optimize”.