Hi. I've owned my Note 4 for a good month or so now, great bit of kit! I've suddenly seen it develop an odd android system drain yesterday. I've tried removing the most recent apps, deleting the system cashe, I'd already removed all the bloatware and and stopped google now etc. The only other different factors are I started using a Sony smartwatch 3 via Bluetooth (although it hadn't caused any issues the first 3 days of use) and I've been in a low reception and WiFi signal area for the last 24 hours. Any ideas?? Thanks.