Our complete guide to eSIM in the UK for 2026, updated daily with eSIM-ready handset deals and SIM-only plans from every major network. An eSIM (embedded SIM) is a small chip soldered into your phone that downloads your network profile over the air, replacing the plastic SIM card you used to slot in. No tray, no waiting for a card in the post, and you can switch networks in minutes.
Every major UK network now supports eSIM: EE, O2, Vodafone and Three across pay-monthly, SIM-only and pay-as-you-go, plus giffgaff, Sky Mobile, Tesco Mobile, iD Mobile, VOXI and Smarty on the MVNO side, with Lebara finally joining the list in late 2025. The phones support it too - every iPhone from the XS onwards, all current iPhone 17 models, the Samsung Galaxy S20 series and newer, the entire Pixel 4 to Pixel 10 line and most flagship Honor, OPPO and Sony handsets.
Compare today's deals below, or scroll down for our plain-English explainer covering activation, dual SIM and transfers between phones.
What is eSIM and why does it matter in 2026?
An eSIM is a programmable chip built into the phone. Instead of inserting a plastic SIM, you scan a QR code or use your network's app and the phone downloads your number, plan and credentials over the air. The chip is rewritable, so you can store multiple network profiles and switch between them without opening a tool tray or visiting a shop.
UK adoption has accelerated. All four mobile network operators - EE, O2, Vodafone and Three - have offered eSIM for several years, and the MVNOs followed in waves. giffgaff added eSIM in 2022, VOXI in late 2024, Smarty in September 2025 and Lebara in October 2025. By mid-2026 every mainstream UK network supports eSIM on pay-monthly, and most also support it on pay-as-you-go.
On the handset side, eSIM is now standard. Every iPhone from the XS onwards supports it, including the entire iPhone 17 line (17, 17 Plus, 17 Pro, 17 Pro Max and the eSIM-only iPhone Air). Samsung covers it from the Galaxy S20 upwards, including the S26 and S26 Ultra, which support a physical SIM plus eSIM or dual eSIM. Every Google Pixel from Pixel 4 onwards is eSIM-ready, and you'll find it on flagship Honor Magic, OPPO Find, Sony Xperia and Motorola Edge handsets too.
Dual SIM is the killer feature for most UK buyers. Almost every eSIM phone supports one active eSIM alongside a physical SIM (or a second eSIM), which lets you run a UK contract on one number and a cheap travel data eSIM on the other - useful for business users keeping work and personal numbers on one device, and travellers who buy a Holafly, Airalo or Saily eSIM on landing while keeping their UK number live.
UK iPhones still have a physical SIM slot in 2026. Apple went eSIM-only on US iPhone 14 models in 2022 and has expanded the eSIM-only sales region since, but UK iPhone 17, 17 Pro and 17 Pro Max still ship with a nano-SIM tray alongside eSIM support. The exception is the iPhone 17 Air, which is eSIM-only worldwide, including in the UK.
Ready to switch? Use the filters above to compare eSIM-compatible handsets on contract from EE, Vodafone, O2, Three and the major MVNOs, or browse SIM-only deals for a cheaper monthly plan you can activate in minutes.