Sounds probable. We bought one from Halfords which has Europe and US maps as well as UK. We have used it in Spain and when we went to Florida this March. When we switched it on then OH thought it wasn't working but as soon as he went outside the villa it started searching for a satellite signal and worked from then on.

Only problem was the "voice" couldn't pronounce Irla Bronson Highway, still made us laugh each time we heard it.

You can upload maps from the internet for other countries but I'm not sure how much they cost.