Skip O2 UK roaming in Portugal
O2 UK customers travelling to Portugal typically pay around $819/GB on legacy roaming, or $6/day for a roaming pass. Silent eSIM is $1.08/GB — no expiry, no contract, no ID.
How to avoid O2 UK roaming fees in Portugal
- 01 Keep your O2 UK SIM active for calls and SMS 2FA at home.
- 02 Install Silent eSIM as a second line (every modern iPhone, Pixel, and Galaxy supports dual eSIM).
- 03 Land in Portugal, set Silent eSIM as the data line — pay $1.08/GB instead of $819.
- 04 Turn off "Data Roaming" on your O2 UK line so it never accidentally bills.
What O2 UK roaming actually costs in Portugal
Most O2 UK customers activate a day pass at $6/day when they land. For a 5-day trip that's $30 — before you've used a single GB. For a 7-day trip, $42.
Silent eSIM charges $1.08/GB with no daily fee and no expiry. A typical traveller uses 2–4 GB per week. At Silent eSIM rates, that's $2.16–$4.32 for the whole trip — compared to $42 on a O2 UK day pass.
You don't have to cancel O2 UK
Silent eSIM runs alongside your O2 UK SIM as a second line. Every modern iPhone (XS and later), Google Pixel (3 and later), and Samsung Galaxy (S20 and later) supports dual SIM. Keep O2 UK active for calls, SMS, and two-factor authentication. Set Silent eSIM as the data line the moment you land in Portugal. Turn off O2 UK data roaming so it never accidentally bills you.
When you leave Portugal, your Silent eSIM balance doesn't disappear — it carries to your next trip to any of 200+ countries. Load it once, use it for years.
FAQ
Will I keep my O2 UK number?+
Yes. Silent eSIM is installed alongside your O2 UK SIM. Your number stays active for calls, SMS, and 2FA — only the data plan changes.
Is Silent eSIM cheaper than O2 UK's day pass in Portugal?+
For most trips, yes. The O2 UK day pass charges $6 every day you use any data. Silent eSIM charges $1.08/GB with no daily fee. A typical 7-day trip using 3 GB costs $3.24 on Silent eSIM versus $42 on the day pass.
How much data do I need for a week in Portugal?+
Most travellers use 1–2 GB per day for maps, messaging, and occasional browsing. A 7-day trip typically needs 5–10 GB. At $1.08/GB that's $5.40–$10.80 total — with no daily fees and no expiry on anything left over.
Does Silent eSIM work on O2 UK phones?+
Silent eSIM works on any unlocked eSIM-compatible device regardless of carrier. Most O2 UK phones sold after 2020 are unlocked by default. Check Settings → General → About on iPhone, or Settings → Connections → SIM Manager on Android.
Does this work in countries beyond Portugal?+
Yes — the same Silent eSIM works in 200+ countries with no reinstall. Your USD balance carries between trips and never expires.
Do I have to cancel O2 UK?+
No. This is a per-trip replacement for roaming data, not for your home plan. Keep O2 UK for everyday use at home.