Tesco Mobile
eSIM + PhysicalO2-based UK MVNO — 6-month activity keep-alive, eSIM only after physical-SIM conversion
Best for: UK-based shoppers who like the Tesco brand and can do the physical-SIM-to-eSIM conversion.
Overview
Tesco Mobile is a 50/50 JV between retailer Tesco and O2, running on O2's network (99% 4G population coverage, 5G supported) across the UK, Ireland, Slovakia and Czechia. Entry eSIM route: order a plan bundled with a physical SIM (PAYG Essentials 30-day bundles: £5/500MB, £10/10GB, £15/25GB, £20/50GB, £30/100GB), then convert to eSIM — the website does not support direct eSIM selection. Keep-alive: one usage record every 6 months. Keep-alive is a hard rule, not a perk: per Tesco Mobile's official terms, no usage for six months or more means disconnection and possible loss of the number and remaining credit.
Tesco Mobile's profile is retail-brand trust on O2 infrastructure: 99% 4G coverage claim with 5G, monthly and PAYG plans, and a keep-alive cadence of one usage record per 6 months.
The friction is eSIM onboarding: the site cannot sell eSIM directly — you order a plan bundled with a physical SIM (PAYG Essentials from £5/500MB up to £30/100GB, all 30-day bundles), then convert inside the account/app afterwards. That makes it the least eSIM-friendly of the reviewed UK options and awkward for buyers outside the UK who cannot easily receive a physical card.
Once converted, it behaves like the other budget MVNOs: priority below O2's own subscribers, monthly-or-PAYG flexibility, and a China-roaming story the source review does not emphasise — group it with the low-cost/flexible tier rather than the China-roaming specialists. Note: the 6-month keep-alive is an official disconnection rule - after six months without usage Tesco Mobile may disconnect the number and keep any remaining credit.
Popular plans
| Plan | Data from | Validity | Price |
|---|---|---|---|
| PAYG Essentials (entry bundle) | 500MB – 100GB (Essentials tiers) | 30-day bundles; 6-month activity keep-alive | £5/500MB → £10/10GB → £15/25GB → £20/50GB → £30/100GB |
PAYG Essentials tiers per Tesco Mobile official help page (2026-09 re-verify); eSIM requires post-purchase conversion.
Pros
- Trusted retail brand on O2's network
- Relaxed 6-month keep-alive cadence
- 99% 4G claim with 5G support
Things to note
- No direct eSIM checkout — physical SIM must ship first
- Impractical for buyers outside the UK
- MVNO priority below O2's own customers
Key features
- O2 network: 99% 4G coverage claim, 5G supported
- One usage record per 6 months keeps the number
- Monthly and PAYG plans
- Physical-SIM-first flow, convert to eSIM afterwards