All muddled up over megabytes? Can't get your head around gigabytes? We explain exactly what you get for your mobile phone's data allowance.
If you have a phone that can surf the web, check Facebook and Twitter, or send emails, then whether you know it or not, you will have a monthly data allowance.
This is the amount of internet use you are allowed in a month without being charged extra.
That's all very well and good but how do you know what is enough, too much or too little when it comes to choosing your smartphone data package?
Helpfully, we've broken it down into terms that are easy to understand for anyone.
Mobile data explained
Firstly, it's worth explaining what each unit of measurement is worth.
Some 1,024 kilobytes (KB) make up one megabyte (MB).
The next measurement up is a gigabyte (GB), which is made up of 1,024MB.
As a point of reference, mobile data allowances of 1GB are commonplace nowadays, but deals can start as low as 100MB and rise to as much as 5GB - though this will bump up the cost of your monthly mobile phone deal.
How far does 1GB go?
Check out this mobile data usage calculator to find out what you can do with 1GB of data
It should make understanding how much data you need a little easier.
How to choose your mobile phone data package
Mark Bridge, mobile phone expert and podcast producer at thefonecast.com, offers the following tips when it comes to choosing your package:
"Make sure you know what happens when you exceed your mobile data allowance: will you be charged at a higher rate, will the service stop working or will it be restricted for the rest of the month?
"And if you're worried about how much you'll pay but are equally worried about being out of touch, look for a truly unlimited data deal."
Mobile internet and beyond
The more data we use, and the more hungry apps and services become for data, the higher the allowance we're going to need.
And with 4G offering customers much faster internet connection the amount of data we're consuming is bound to rise, and with it, the size of data deals.
Bridge says: "Wi-Fi is becoming a selling point, with everyone from supermarkets to bookshops giving away free internet access as an incentive to shoppers.
"Perhaps in the future we won't need to pay for mobile data at all – we'll simply connect via Wi-Fi in each shop we visit."
Compare mobile phones - you could find a great deal in minutes Get latest phone deals