No idea if this still works. If it doesn’t, or if you’re on Android 7.1.1, check here: https://plumz.me/archives/5167/ Don’t know if the Great Firewall was putting on a show lately or what, but yesterday I noticed my Nexus 6 was just sitting at home and Cell network alone was eating 60% of my battery, way more than Shadowsocks and the screen. Took a closer look and there was always an exclamation mark on the network signal — exclamation mark with Wi-Fi, exclamation mark without Wi-Fi. Everyone knows why the exclamation mark shows up, and I was running Shadowsocks too, even tried connecting straight to a router with a proxy, and it was still there. Searched Reddit, and the foreigners said excessive cell network drain is related to poor signal quality — which is obviously not normal here. China Unicom’s signal can be shit, but not this shit. The only possibility is that the exclamation mark makes Android unilaterally decide my signal is bad. So the only option was to get rid of that exclamation mark. After digging around, I found some folk remedy. No idea how it works, but it cured the problem outright.