Contact Us

In accordance with the applicable legislation, it is granted the right of access, rectification and updating of your personal data, directly or by written request, as well as the right to oppose to the use of such data for commercial purposes by Onitelecom. You should, for that matter, contact the responsible entity for the personal data processing, Onitelecom – Infocomunicações, S.A., Avenida D. João II, Lote 1.16.01, 8º Piso, Parque das Nações, 1990-083 Lisboa.
The collection of the personal data filled in the contact forms of the institutional website of ONI, is intended for the provision to the data owner of the necessary clarifications regarding the services that he shows interest in obtaining more information on, as well as the use of such data by ONI for publicity actions, direct marketing and promotion of the services it offers, including, for example, SMS, MMS and e-mail contacts.

Customer Support | T: 16500

Working days from 09h to 19h, free calls from all national fixed networks and ONI mobile network, 30 cents/min (VAT included), from other mobile national networks.


Portability Announcement and Tariff Information | T: 16502

Helpline for activating or deactivating the portability announcement, to access tariff information and mobile customer support.
24 hours a day, 7 days a week.
Free from Portugal, from abroad dial +351 928 519 999 (Free in the Eurotariff zone, paid in other zones according to the roaming tariff in force).


Customer Ombudsman | +351 300 504 548


Point of contact for Digital Services (Digital Single Act/DSA):

Billing and Litigation | +351 211 154 300

Tuesdays and Thursdays from 15h to 18h


General | +351 211 154 300

Working days from 9h to 18h


Central of Operational Management | 800 500 800

Everyday 24 hours (free)


Roaming Support | +351 928 519 999

(from abroad)
Available 24 hours a day. Free calls at the Eurotariff zone; paid on the remain zones according to the roaming price list.


ONICARDS Line 707 503 334

Working days from 9h to 18h (Fixed network: €0,09/min, mobile network: €0,13/min. Billed per second after the 1st minute).


Avenida D. João II, Lote 1.16.01, 8º Piso
Parque das Nações
1990-083 Lisboa | Portugal
T: (+351) 211 154 300*
F: (+351) 211 154 399


38°46’07.6″N 9°05’53.7″W

* Working days from 9am to 6pm.



Rua de Gonçalo Cristóvão, 347
Edifício MAPFRE – Sala 509
4000-270 Porto
T: (+351) 220 009 080*


Rua Brigadeiro Oudinot
Edifício Oudinot – 3º, salas 301/302
9060-209 Funchal
T: (+351) 291 000 022*

* Working days from 9am to 6pm.