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We compare the numbers to see who the best mobile network is to get the best value data - See how the SIm networks stack up with our full guide.
Smarty are well-known for having very low-cost SIM only plans - Their latest Unlimited data SIM offer is their best yet.
Choosing the right type of SIM contract is tricky. Here's why you might want a 1-month or 30-day SIM deal.
A SIM only contract is a stand-alone mobile phone contract with a package of texts, call minutes and mobile data.
With a SIM deal you only pay for the package every month, not the phone.
When you usually take out a mobile phone contract your payment covers two things: the usage of texts, minutes and data and the handset you're using.
Mobile phone networks are essentially "leasing" the handset to you for a monthly fee. At the end of your contract (usually 12 to 24 months) they hope that you've paid the full cost of the phone. The SIM is just the microchip the phone uses to access the network.
A SIM only contract is just a SIM card, this allows you to choose the phone so you're only paying for the part of the contract that covers the network usage and not the more expensive handset.
Once you reach the end of your mobile phone contract you have a few options:
If you move to a new network you can keep your old number by taking just a few simple steps.
Firstly, you'll need to ask for a PAC code from your current network - Your PAC code is provided for free and will be made up of three letters and six numbers.
You can request a PAC code by phone or email and there is sometimes a form on your networks website to request it.
Once you have your PAC code you can give it to your new network who will transfer the number to your new contract.
There is a credit check for most SIM contracts. If you want a 12 month contract there will certainly be a credit check but for one-month rolling contracts there are some networks who do not credit check - Compare no credit check SIM only deals here
Whilst your credit is being checked it's important to know that for one-month SIMS the check is less stringent.
There are plenty of great, affordable SIM options even if you fail a credit check and many pay as you go deals have offers that make them comparable to a contract (so long as you keep them topped up with credit)
There are lots of options when choosing a network, most customers stay with a well-known networks such as EE, O2, Three or Vodafone but there are plenty of good deals to be had when you compare them to newer, smaller networks such as Smarty, Voxi or giffgaff.
Many small networks in the UK use the infrastructure of the larger networks to provide their service so things like coverage are the same - in which case it's good to compare factors such as data amounts and network perks.
Luckily, when when you compare the current offers they can be divided into different categories:
Most of the UK's top mobile networks offer SIM contracts. Compare deals from: