In the past, only people who were willing to pay a lot of money could get an unlimited data SIM. But the market has changed a lot. Today, whether you stream a lot, work from home, or just want to forget that data caps exist, there are some great deals that won’t cost you a lot of money.

We at SIM Only Expert have looked through the current market to find you the best unlimited data deals that are available right now. This is everything you need to know to choose the right plan.

The Best Unlimited Data Deals Right Now

When you want the best deal on unlimited data, you should look for “piggyback” networks (MVNOs). These companies use the same infrastructure as the “Big Four” networks (EE, O2, Vodafone, and Three), but they usually charge a lot less.

1. iD Mobile: The Budget King

iD Mobile, which uses the Three network, has one of the best deals right now. They often have the best deals on the market, with 12-month contracts that start at £15 to £16 a month.

  • Best for: Getting the most for your money and access to 5G.
  • The Perk: They often give “months free” deals or cash back through third-party stores, which lowers the effective monthly cost even more.

2. The Master of Flexibility: SMARTY

If you don’t want to be tied down, SMARTY (also on the Three network) is the best choice. Their unlimited plan costs between £18 and £20 per month, and you can pay for it every month.

  • Best for: Not having to check your credit and being able to cancel at any time.
  • The Perk: Prices won’t go up every year, which is a big win in this economy.

3. VOXI: The Social Media Specialist

VOXI, which is owned by Vodafone, has a unique offer. They do have some “unlimited” plans, but their “Endless Video” and “Endless Social” perks on smaller plans are what they’re known for. But their full unlimited data plan usually costs about £20 a month.

  • Best for: Reliable 5G coverage from Vodafone and fast speeds.
  • The Perk: No contracts at all.

4. The International Choice: Lebara

Lebara (Vodafone network) often has “introductory offers” for people who need to call abroad. You can get unlimited data for as little as £10–£12 for the first few months, after which the price goes back to normal.

  • Best for: Minutes for roaming and international calls.
  • The Perk: Most plans come with 100 international minutes to 42 countries.

Three Things to Look at Before You Buy

Keep these expert tips in mind before you hit “order” to make sure you don’t get caught by the fine print.

1. Coverage is the most important thing

If you can’t get a signal in your living room, an unlimited plan is useless. Check the coverage map for the “parent” network every time:

  • Vodafone is used by Lebara, Talkmobile, and VOXI.
  • Three is used by SMARTY and iD Mobile.
  • O2 is used by Giffgaff, Sky, and Tesco Mobile.
  • EE is used by Spusu and Lyca Mobile.

2. Keep an eye out for speed limits

Some “unlimited” plans have limits on speed. Some networks, for instance, sometimes have cheaper “Lite” or “Speed Restricted” unlimited plans that are limited to 2Mbps or 10Mbps. These are fine for basic web browsing, but they won’t work well for 4K streaming. Always look for speeds that say “Uncapped” or “Fastest Available.”

3. The “Secret” Price Increase Every Year

Every April, a lot of well-known networks raise their prices by the rate of inflation plus 3.9%. Stay away from this by using providers like SMARTY or Lebara, which promise not to raise prices in the middle of a contract.

In short, which unlimited SIM should you get?

  • iD Mobile (12-month contract) is the cheapest overall.
  • SMARTY (No contract) is the best for freedom.
  • Lebara is the best for roaming.
  • If Vodafone has the best coverage in your area, look for Talkmobile or VOXI.

Want to lower your monthly bill? It’s easier than ever to switch. Text “PAC” to 65075 to get your switching code and keep your number!