Fonia review

Updated October 12, 2026 · TariffCue Editorial Team

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Our verdict

For people in Poland deciding between SIM and eSIM, Fonia is a Polish mobile operator with SIM and eSIM plans. It suits people who want to keep an existing number while choosing the plan format that fits their mobile phone setup.

Key facts

Best for
People in Poland choosing SIM or eSIM plans
Markets
PL
Official website
fonia.app

Pros

Pros

  • Offers SIM plans alongside eSIM plans for mobile use
  • Acts as a Polish mobile operator serving Poland
  • Supports bringing an existing number when joining a new plan

Ready to try Fonia?

Scored 8.0 / 10 by TariffCue.

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Who it suits

  • People in Poland wanting a SIM plan
  • People in Poland wanting an eSIM plan

Our full take

Fonia is a Polish mobile operator offering SIM and eSIM plans on the Orange or Plus network, with number porting in 5 minutes.

How Fonia compares

Frequently asked questions

What does Fonia sell?+

Fonia sells mobile plans in SIM and eSIM formats for use in Poland. You choose the format that matches your phone and how you manage cards. Number porting is supported, so an existing number can move across with the new plan.

Where does Fonia work?+

Fonia works in Poland as a Polish mobile operator. Its SIM and eSIM plans are aimed at mobile users there. Check that your use falls inside Poland before choosing a plan.

How does keeping your number work?+

Fonia supports number porting when you start a SIM or eSIM plan. You request the move and keep your existing number. This avoids telling contacts about a change and keeps account details steady.

Sources

  • fonia.app checked October 9, 2026

    Backs: Description

Compiled from 1 source page, checked October 17, 2026. We did not open an account.

Not confirmed yet: Seller type, SIM-only, Billing, Price from, Reference plan prices, Unlimited plan price, Contract length.

Fonia

People in Poland choosing SIM or eSIM plans

8.0/10Visit

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