BT Mobile SIM Only deals

No deals available with a 1 Month term.
Here are the cheapest sim only deals and the cheapest unlimited data SIMs.

If you're thinking of switching phone contracts, it's worth weighing up the options available to you. Not everybody wants a new phone every time they change providers, even though it can be tempting to get your hands on the latest model to hit the shelves.

A Sim Only deal from BT provides you with a package of texts, call time and mobile data for a low monthly cost, in much the same way as a standard mobile contract. However, the difference is that you won't receive a brand-new handset as part of the deal – instead, you'll quite literally get the SIM only!

If you own a phone outright, and you're perfectly satisfied with it, a SIM Only contract with BT could help you to save on your monthly mobile bill. This is because traditional phone contracts involve paying a premium to cover the price of the handset itself. When you factor in that most contracts involve getting the very latest, top-of-the-range handset, the costs can soon start to add up – particularly if you throw in extras like insurance against damage or theft.

Why a BT Sim Only deal makes sense

The beauty of BT SIM Only plans is that they are not only cheaper, but more flexible too. With BT, you can easily change the amount of data available to you only a rolling monthly basis, instead of being tied down to a set amount for the duration of your contract.

You'll also be able to change your phone as and when you feel like it – not just when your provider decides that it's time for an upgrade. If you already have a phone that you're familiar with, this means you can remain on the same handset without having to learn about the features available on a newer device.

On the contrary, if you're the sort of person who enjoys having the latest tech, you'll have the freedom to purchase a new handset whenever you feel like it without waiting for an upgrade. Simply pop your existing SIM into your latest device and away you go!

Managing your spending

One of the reasons why so many consumers are switching to BT Mobile SIM Only deals is that these deals allow you to take total control over what you spend. In an age where it's all to easy to unknowingly run up huge bills when using data, the good news is that you'll be able to put usage and spending caps in place with a BT Mobile Sim Only contract. If you spend a lot of time abroad, you'll also be able to configure your spending caps for when you're outside of the country.

You can expect to be kept in the loop, receiving text notifications when you're nearing your usage limit. In addition to this, the BT Sim Only app allows you to monitor your exact call, text and data use. Of course, you'll also have the freedom to change your usage limits at any time you desire.

Discount for broadband users

If you're already a BT home broadband customer, you could save even more money when you and your family switch to BT SIM Only plans. You could save £5 per month on the latest BT SIM deals, and you won't even need to be the account holder. If you live in a home or flat with a BT broadband connection, you – and everybody else in your household for that matter - may be able to eligible for the discount.

Unlocking your device

The only possible downside to any SIM Only deal is that you may need to unlock your existing device if it is locked to another network. When a device is locked, it will only function with a SIM card associated with the mobile phone network you obtained the phone from.

Thankfully, it's relatively easy to unlock most devices – and if your handset is over two years old, your existing network might even unlock it for free. In most cases, however, you can expect to pay a small charge to unlock your phone for use with any SIM card that's not from that specific provider, and you may have to wait a day or two before the device unlocks. However, this is a small price to pay for the incredible savings you'll enjoy when you become part of the BT SIM Only family.

If you don't want to unlock your device, you'll also have the option of purchasing a new unlocked device, ready for use with your BT SIM card.


Now is a great time to switch to a BT Sim Only contract if you want to enjoy the following benefits:

  • Retain your existing handset
  • Save a substantial amount on your monthly mobile bill
  • Enjoy the flexibility to increase/decrease data usage on a rolling basis
  • Discount if you're an existing BT Broadband cu stomer
  • Gain control over how much you spend

Not sure if a BT SIM only deal is the right choice for you? Take a look at the cheapest sim only deals and the cheapest unlimited data SIMs compared for all the networks.

Specific discounts, offers, and deals can change, please check the retailers own terms and conditions when making a purchase.