Three vs o2 eSim Comparison
Three vs O2 eSIM comparison in 2026 shows Three leading with faster 5G speeds up to 276Mbps and unlimited data from £12/mo, ideal for streaming/gaming, while O2 excels in 4G coverage (99%) and EU roaming up to 25GB on plans from £6.99/mo for 12GB.
Both support instant QR eSIM activation on iPhone 14+/Galaxy S23, but Three offers better WiFi calling on more devices; O2 adds Priority perks like free Virgin Media trials. Choose Three for urban speed, O2 for rural reliability and roaming.
| Feature | Three | O2 |
|---|---|---|
| 5G Speed | 276Mbps | 85Mbps |
| Data Example | Unlimited £20/mo | 40GB £8/mo |
| Coverage | 588+ 5G sites | 3200+ 5G locations |
| EU Roaming | 12GB limit | 25GB o2.co.uk |
Which Delivers Faster Data Speeds?
Three tops charts at 208-276Mbps 5G downloads via 140MHz spectrum, perfect for UHD streaming in London/Manchester. O2 lags at 80-85Mbps but sufficient for HD video. Both uncapped; Three edges 4G at 38Mbps vs O2's 23Mbps.
- Urban: Three 5G dominant.
- Indoor: O2 WiFi hotspots free at 15K+ sites.
- 2026 tests: Three 3x faster 5G, O2 consistent 4G.
How Do Coverage Maps Compare UK-Wide?
O2 boasts superior 4G/2G/3G for calls/texts across rural Scotland/Wales at 99%, with 3200+ 5G spots. Three focuses 5G in cities (588+ sites), weaker voice signal sans 3G. eSIM profile swaps seamless on both.
| Area | Three Strength | O2 Strength |
|---|---|---|
| Urban 5G | 208Mbps | 80Mbps |
| Rural 4G | Good | 99% coverage |
| Voice/SMS | WiFi calling | Native 2G/3G |
What Roaming and Perks Differentiate?
O2 includes 25GB EU roaming no extra cost, vs Three's 12GB cap; Three shines outside EU with 160+ zones on premium plans. O2 Priority: early tickets/streaming trials; Three: Paramount+ subscription, phone warranty.
- eSIM support: Three broader Android compatibility.
- WiFi calling: Three more flexible, O2 visual voicemail.
- Contracts: Both 12/24-mo, PAYG data rollover on O2.
When to Pick Three vs O2 eSIM?
Opt for Three eSIM on 5G-heavy urban contracts needing speed/unlimited data; O2 eSIM for balanced coverage, roaming, and perks on lighter plans. Activation via app/QR in 2 mins; tethering uncapped both. three.co.uk