Free and impartial
Rated 4.9 / 5 on Google*
Offers from all the major networks
Compare MobileStart Comparing
Having unlimited data available to you on your smartphone may seem unnecessary, but there are many of us nowadays who like to enjoy full use of our phones wherever we go. If you like to stream, listen to music and browse the internet constantly then removing the data cap on your phone may be the way to go. Read our useful guide to find out more about unlimited data SIM options and discover the best deals available right now.
There are various options for you when it comes to unlimited SIM deals and it can be confusing when deciding which is the right deal for you. The basic types of unlimited SIM deal are as follows:
Whether you actually need an unlimited data SIM depends entirely on how you use your mobile device. Before deciding to buy unlimited data, it is a good idea to work out exactly how much data you use monthly. If your current limit is low at around 5GB and you have never exceeded it, then you probably won’t need unlimited data. However, if you already have a large data limit, say 20GB, and you find yourself running out of data a lot, then unlimited data is something you should consider. Some reasons you may want unlimited data are:
Until recently, a few of the larger network providers didn’t have unlimited data deals, but now there are plenty of options available. A few providers still don’t offer unlimited data plans including Asda Mobile, BT Mobile, Plusnet Mobile, Sky Mobile and Tesco Mobile. Here are the networks that have unlimited data options:
Unlimited data SIM only deals are the most expensive SIM only plans that you can buy, but this doesn’t mean that you can’t afford them.
Use our price comparison table above to find affordable unlimited data plans.
SIM only deals provide a great way to save money on your mobile phone and stop you from getting stuck in long contracts. If you don’t need to upgrade your mobile, then getting a SIM only deal is an affordable, flexible way to continue using the phone you want the way you want.
Even if you do want a new phone it may be cheaper to buy the phone and the SIM separately, depending on the phone and the SIM only deal you choose of course. With unlimited data, take the iPhone as an example – you can get locked into a 24-month contract that will cost you around £1,500 over two years. Instead, you could buy an iPhone up front for around £1,000 and pay for a SIM only deal that over two years would cost you far less.
There are three sizes of SIM card – standard, micro and nano. Your network provider or retailer will help you choose the correct size so you shouldn’t have to worry.
If your existing mobile was bought with a traditional contract, then it may be locked to the network provider. If the contract has ended it is easy and free to unlock the phone so you can use it with a different deal. If it is locked then be aware that unlocking can take up to 10 days and can cost up to £15 to complete, depending on your situation.
If you are switching deals, then it is possible to keep the same mobile number. Just make sure that you request your PAC (Porting Authorisation Code) from your old provider before you leave. You can then give the PAC to your new provider within 30 days of your new deal and they will switch your number within one working days.
Your unlimited data plan will allow you to use the internet as much as you like when you’re in the UK, but unfortunately this won’t be the case when you’re overseas. Your data limit abroad will depend upon what plan you have chosen and which network you are on. Read our useful guide on International SIM card deals here for more information on the best SIM deals for travelling.
*Rated 4.9 / 5 by 19 reviews on Google
**£350 is the average saving achieved by 10% of all customers who switched their dual fuel supply in 2019 via our partner energy journey