It is always worth considering what you think you would expect to use in a month in terms of minutes, texts and internet. Why is this so important? Simply because if you go over your monthly allowance, especially with your included minutes, you could end up paying a lot more than a tenner at the end of the month.

To give you an idea of what we are talking about let's compare one of the cheapest sim only plans on offer. The Dolphin 7 sim card costs £7 a month and for that you receive 150 minutes, 500 texts and 250mb of internet. Now this is great if you're after a sim card when you are on a tight budget or you just want something that is low usage and suits your needs. But what if one month you use 200 minutes instead of 150? Well every minute outside of your plan costs 35p which adds up to £17.50 for the extra 50 minutes. Now your £7 a month plan becomes £24.50 for the month. Now you're not saving the money that you expected to save anymore!

Instead if you were to choose the Dolphin 10.50 plan you would then have your 200 minutes included in the plan plus you now receive unlimited texts too. So for an extra £3.50 you have just saved £14 pounds on one month alone. Now if you add that up over a year you have either wasted a lot of money or saved loads of money dependant on which offer you decided to go for.