When choosing a data plan, you are sometimes forced to make a decision without enough information. Meaning: How are you supposed to know how much data you are using when you are doing this for the first time? Or when you are adding people to your existing account?
How much data do you need?
Of course, you can play it safe and opt for an unlimited data plan, but such plans are often quite expensive. So it is better to choose a specific plan and adjust your data usage accordingly.
Many cell phone and mobile broadband providers offer tiered, rather than unlimited, data plans: a lower price for up to 200MB of data access per month, for example, versus a higher data cap of 2GB or 5GB. To determine which mobile data plan is best for you, find out how much you can download or surf with each data limit and compare that to your needs and actual usage. Then, find the best mobile data plan for you based on those numbers.
If you already have a data plan, you can check your mobile phone bill to see how much data you use on average per month. Based on that, you can decide whether you want to switch to a lower or higher data plan.