250Mb is not a lot…unless you are constantly relying on being somewhere with Wi-Fi…
I hardly ever turn the Wi-Fi on, on my phone. I’ve got unlimited data and the connection to my phone via the network is about as fast as my home broadband so there’s no point flipping it to Wi-Fi.
This month so far, I’ve used 2.4Gb:
1.66Gb on Spotify
322Mb on Facebook
161Mb on Chrome
71Mb on Android OS
70Mb on Maps
35Mb on Play Store
and then a ton of smaller quantity stuff.
I wouldn’t say I was that heavy a user, apart from Spotify which I listen to quite a bit at work and will occasionally plug in at home.
Although, if I had to go onto a more restricted data package, I could use Wi-Fi most of the time and drop my data usage to below 1Gb without too much bother.