Updated: 27 August 2025
Sharing a mobile plan with your family can save money and simplify billing. Many UK networks offer discounts for multiple SIMs or shared allowances, helping you get the most out of your data without paying extra. Below is a comparison of the best family SIM deals in 2025, followed by detailed insights on each network.
Networks offering family SIM deals
| Network | Plan | Discount / Perk | Action |
|---|---|---|---|
| Vodafone | Family SIM | 15% off additional SIMs | Compare |
| Three | Connect Together | Up to 20% off extra plans | Compare |
| O2 | Multisave | 20% off airtime (up to 20 users) | Compare |
| Smarty | Group Plan | 10% off extra SIMs (no contract) | Compare |
| 1p Mobile | Unlimited Boost | Half-price additional SIMs | Compare |
Vodafone Family SIM
Vodafone’s Family SIM plan gives 15% off additional SIMs. It’s ideal for families who want reliable network coverage and predictable pricing. Each member enjoys the same standard allowances, and all SIMs are on a single bill.
Pros: Strong network, simple billing, easy management
Cons: Discount only applies to SIM, not device cost Compare Vodafone
Three Connect Together
Three allows up to 20% off extra plans with Connect Together. This applies to SIM Only, Pay Monthly, tablet, and broadband plans, letting you manage everything under one account.
Pros: Big discount for multiple plans, one combined bill
Cons: Some discounts require 12/24 month plans Compare Three
O2 Multisave
O2 lets you add up to 20 users to a Multisave plan, giving 20% off airtime. Each user can have different allowances, perfect for large families.
Pros: Large family support, flexible allowances
Cons: Discount only on airtime, high base prices Compare O2
Smarty Group Plan
Smarty offers 10% off extra SIMs with no contract. Each member can choose their own allowance, making it highly flexible.
Pros: Flexible, cheap base plans, no contract
Cons: Small 10% discount Compare Smarty
1p Mobile Unlimited Boost
1p Mobile allows additional SIMs at half price. Works best for unlimited data plans with simple monthly costs.
Pros: Half-price SIMs, simple billing
Cons: Only for unlimited plans Compare 1p Mobile
Which family SIM deal do we recommend?
Smarty’s Group Plan is the standout for affordability and flexibility. While the discount is smaller than Vodafone’s, Smarty’s base plans are cheaper and 30-day contracts give full freedom.
Considerations when choosing a family plan
Discounts vs data sharing
Decide whether discounts per SIM or shared/rollover data is more useful for your family.
Contract length and type
Some networks tie you into long-term contracts, while others like Smarty offer flexible 30-day plans.
Adding/removing members
Check if you can easily add or remove SIMs to adjust to your household.
Other network features
Look at coverage, speeds, allowances, tethering, roaming, and extras like unlimited social media or data rollover.
