Samsung Galaxy S5 Neo
Last two months I have had a huge increase in data usage. From average of 130mb per month out of my 500mb allowance, it soared to.... for June, it was was 564mb and July it was nearly 600mb. First 2 days of this month it was 202mb total. Nothing had changed, I am practically housebound so phone is connected to WiFi 24/7. I wasn't using any social media more than usual nor other apps. O2 gave me a bolt-on of 500 mb until this was sorted, which they haven't been able to,so far. All they keep doing is to tell me to switch off Mobile Data. I never did before nor have done on the last 3 Samsung phones I have had from O2.... that's not solving the problem nor telling me why the usage has gone so high.
I went back to when this excessive usage first began around 15th/16th June (O2 told me that was when the usage went up, but couldn't tell me why.) so I worked it out to being either when 4g first started in this area and I'd also downloaded the app Android Pay about this time too.
I have turned off 4g and also Android Pay and my usage has dropped way back down to what it was. A very rude & obnoxious O2 advisor tried to tell me that 4g did use a bit more data usage, maybe it does but not to the tune of 400%-500%.
If it is either one of those apps causing the increase, I will be pretty annoyed if it is the 4g. Not too bothered with Android Pay but not having a phone that can use 4g is poor. I should have kept my other phone instead of updating.
