I have hardly used WhatsApp today, opened it a couple of times,.haven't done any communications with anyone, haven't received any updates yet my Data monitor app shows me accumulated downloads of around 300MB. I don't see any logical explanation for this. I have not noticed that before. I started using sandboxed Google Play two days ago. Anyone has opinion this? Is there any network monitoring app that I could use on device not interfering with (or having to replace) my VPN service to get to the bottom of this? Using 6a with latest OTA update.