Tips on saving cellular data?

Hi I'm going to get an iPhone. I heard from a lot of people saying that their data goes quickly. How can I save data?

Go into settings> cellular and disable it when not in use. That's what I do, if you jailbreak you can install a tweak called cccontrols that allows a quick toggle of the cellular data!

You should get the plan with the most date and what you want up pay
Always have Wi-Fi on so you can use Wi-Fi when it's available, also put your phone on airplane mode or turn off data in settings when your not using it so your phone isn't updating or searching for things automatically that you don't want.

Turn off Cellular Data when you've Wi-Fi available. Turn it on when you need it and there's no Wi-Fi you can access. That's how you save cellular data. Or go prepaid like on StraightTalk and MetroPCS or SimpleMobile and you'll have unlimited data.