Xperia V always active
[Spoiler]Okay, first of all, I'm on an Xperia V, with latest firmware (4.1), unrooted.
So lately I've been having trouble with battery life. I don't really use my phone much, since I've got a Nexus 7, but the phone just plows through the battery.
The problem was that the phone always stayed active, even with battery saving modes on. Now I didn't use many sensors, like GPS, NFC, BT, and WiFi Location, but still I couldn't get it to last very long.
Now two days ago, I factory reset it and set it up. I tried Smart Connect and Location Based WiFi to automate my phone, and battery life was pretty good, definitely better than previous.
But now today, my battery life is once again bad. I haven't really found the source of the problem, it's not an installed app that drains the battery, and the battery usage shows that 'Media' and 'Android System' drains the most battery, and that the phone stays active when it's sleeping.
I've also noticed that my signal drops frequently, even though I'm in the town.
What can I do?[/Spoiler]
TLDR; Xperia V, latest 4.1 firmware, unrooted. 'Media' and 'Android System' drain most battery, phone stays active all the time, no GPS, Location, NFC, BT. Tried factory reset. Don't know what to do. Frequent signal drops too.
I'm gonna try a factory reset without the SD-card, I don't even use it.
Here are battery and wakelock screenshots: