# Best SIM Only Deals _CompareFairly · en/GB · neutral comparison, cited sources, no paid placement_ **Category:** telecom › mobile phone › sim only deals **Our pick**: Giffgaff SIM Only (69/100) · **Cheapest**: Lebara Mobile SIM Only · **Best value**: iD Mobile SIM Only ## Comparison table | Criterion | Giffgaff SIM Only | Vodafone SIM Only | iD Mobile SIM Only | Tesco Mobile SIM Only | EE SIM Only | Virgin Mobile SIM Only | | --- | --- | --- | --- | --- | --- | --- | | Monthly Price (GBP) | 10 | 12 | 8 | 11 | 15 | 10 | | Data Allowance (GB) | 15 | 20 | 8 | 12 | 25 | 10 | | Contract Length (mois) | 1 | 30 | 1 | 1 | 12 | 1 | | Roaming Allowance | Limited | Generous | Limited | Limited | Limited | Limited | | Network Coverage | Excellent | Excellent | Good | Good | Excellent | Good | | 5G Availability | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | | Customer Service Rating | Good | Average | Average | Good | Good | Average | ## 1. Giffgaff SIM Only Flexible SIM-only plans with good community support and no contract. _Source (estimate): [https://www.giffgaff.com/sim-only-deals](https://www.giffgaff.com/sim-only-deals)_ ## 2. Vodafone SIM Only Includes Speed Boost, inclusive roaming in 84 worldwide destinations (25GB), 5G+ ready, and unlimited picture messages. **Best for:** Frequent international travelers and users who want the fastest 5G experience with entertainment. **Pros:** - Speed Boost: up to 2x speeds - Inclusive roaming in 84 worldwide destinations - 5G+ ready _Source (verified): [https://www.vodafone.co.uk/sim-only/best-sim-only-deals](https://www.vodafone.co.uk/sim-only/best-sim-only-deals)_ ## 3. iD Mobile SIM Only Uses Three Mobile's Network, includes 5G data and no annual price rise. **Best for:** Users looking for a budget-friendly 5G plan with data rollover and no price increases. **Pros:** - No annual price rise - 2 months Free Apple Fitness+ Music and Arcade - Data rollover _Source (verified): [https://www.uswitch.com/mobiles/compare/sim_only_deals/](https://www.uswitch.com/mobiles/compare/sim_only_deals/)_ ## 4. Tesco Mobile SIM Only Tesco Mobile offers SIM-only deals with Clubcard points and flexible contracts. _Source (estimate): [https://www.tescomobile.com/sim-only-deals](https://www.tescomobile.com/sim-only-deals)_ ## 5. EE SIM Only EE offers a range of SIM-only plans with excellent network coverage and 5G. _Source (estimate): [https://shop.ee.co.uk/sim-only-deals](https://shop.ee.co.uk/sim-only-deals)_ ## 6. Virgin Mobile SIM Only Virgin Mobile SIM-only plans offer data rollover and access to Wi-Fi hotspots. _Source (estimate): [https://www.virginmedia.com/mobile/sim-only-deals](https://www.virginmedia.com/mobile/sim-only-deals)_ ## 7. BT Mobile SIM Only BT Mobile SIM-only deals often include extras for existing BT broadband customers. _Source (estimate): [https://www.bt.com/mobile/plans/sim-only](https://www.bt.com/mobile/plans/sim-only)_ ## 8. O2 SIM Only O2 SIM-only plans often come with perks like O2 Priority and good network reliability. _Source (estimate): [https://www.o2.co.uk/sim-only-deals](https://www.o2.co.uk/sim-only-deals)_ ## 9. Plusnet Mobile SIM Only Plusnet Mobile offers competitive SIM-only deals with inclusive minutes and texts. _Source (estimate): [https://www.plus.net/mobile/sim-only-deals](https://www.plus.net/mobile/sim-only-deals)_ ## 10. Lebara Mobile SIM Only ## 11. Three SIM Only ## 12. VOXI SIM Only ## In short This comparison of 12 SIM-only deals across nine criteria, including monthly price, data allowance, contract length, call minutes, text messages, and roaming allowance, places Giffgaff SIM Only first with a score of 69/100, largely due to its perfect scores in 5G availability and contract length, while Vodafone SIM Only ranks second with 58/100, excelling in roaming allowance, and Lebara Mobile SIM Only is identified as the most affordable option. The facts in this summary are computed from the table below; only the wording is generated. ## Frequently asked questions **What are the best SIM only deals available right now in 2026?** The best SIM only deals in 2026 include Giffgaff SIM Only, which ranks highest, followed closely by Vodafone SIM Only, based on our comprehensive comparison of monthly price, data, contract length, and more. **How do I choose the right SIM only plan for my needs?** To choose the right SIM only plan, consider your typical monthly usage for data, calls, and texts, as well as your budget and any international roaming needs. Our comparison criteria can help guide your decision. **Is Giffgaff SIM Only the cheapest option for a SIM only deal?** Giffgaff SIM Only is currently our top-rated option, offering a strong balance across all comparison criteria. For the absolute cheapest monthly price, it's important to compare the specific plans listed on our page. **How is the ranking of SIM only deals determined on this page?** Our ranking is based on a neutral, data-driven methodology, assessing each SIM only deal against key criteria like monthly price, data allowance, and contract length. Our position is not influenced by any paid placements. --- _Generated by CompareFairly - neutral universal comparator. Ranking not for sale, data sourced._ --- _CompareFairly · https://comparefairly.com/en/GB/best-sim-only-deals — citation with a link is allowed; bulk extraction/redistribution is prohibited._