Talk:Portugal/@comment-26994523-20150917143346/@comment-213.179.124.4-20150917174723

Hi BeverlyAnn. Normally SIM Cards work in Europe. In Portugal all three providers are present on the Azores Island. You can use the same SIM card. That your SIM card is not working on your "dumb phone" may be because of lots of technical incompatibilities between the US and most of the rest of the world.

You need to have a unlocked GSM phone working on 900 and 1800 MHz (that's 850 and 1900 MHz in the US instead) for 2G, and 2100 MHz in Portugal for 3G (instead of 850, 1700, 1900 MHz in the US). 4G/LTE is even more apart.

Try to find in a technical specification factsheet (manual or website) which frequency bands are covered by your device to prevent disappointment.