en.wikipedia.org/wiki/Telephone_numbers_in_Portugal

Portugal changed to a closed telephone numbering plan in 31 October 1999. Previously, the trunk prefix was '0', but this was dropped. For landline subscribers  ...

www.expatica.com/pt/moving-to/portugal-mobile-operators-numbers-prepaid-sim-cards_1028645.html

Signing up for a monthly mobile phone contract in Portugal is a bit more complicated than ...

www.justlanded.com/english/Portugal/Portugal-Guide/Telephone-Internet/Cellphones

Jun 29, 2014 ... It is possible that you will need your phone unlocking in order to use a Portuguese SIM card. In Portugal it is extremely easy to find a place that unlocks  ...

community.ricksteves.com/travel-forum/portugal/cell-phones-in-portugal

Can I use an unlocked smart phone from the U.S. (Samsung/AT&T) in Portugal by simply changing out the SIM card and purchasing air time?

www.lonelyplanet.com/portugal/telephone

Using your mobile phone in Portugal and tipsd on local and international call costs.

www.onesimcard.com/cell-phone-rates/portugal

Prepaid cell phone service in Portugal and 223 countries. Portugal SIM card - free incoming calls and texts. Portugal cell phone rental available.

www.cellularabroad.com/portugal-phone-plans.php

If you are planning a trip to Portugal and are looking for affordable and reliable cell phone and data options, you have come to the right place. Chances are, you  ...

www.expat.com/en/guide/europe/portugal/10797-phones-and-internet-in-portugal.html

An overview for new expats on mobile phones, landlines, and internet access, including wifi, in Portugal. Communications in Portugal.

www.yelp.com/search?cflt=mobilephones&find_loc=Lisbon

Best Mobile Phones in Lisbon, Portugal - Parlapié, Rashpal Singh, Sanjeev, GMS, Gadget Hub, Vectone, CTT - Aeroporto, Mae Telemóveis, Globaldata, Vera  ...