Sim Card in foreign Countries

Hello guys
I am from Denmark and I have an iPhone that i have bought in Denmark a couple of years ago.
At the moment I am in SouthAfrica where I am staying for 2 months. I have bought a prepaid simcard (Vodafone) and inserted into my phone. When i put it into my phone it comes up with a box saying sim mistake or something like that and all i can do is press ok. when i look in top left corner it says invalid sim card.
is there any way i can get an south african sim card to work on my danish phone or is it locked to danish tele companies ?

It is probably locked to the Danish carrier, but you could contact them and ask about unlocking, particularly if you bought it outright or are finished with/near the end of your contract.

Since you are only in South Africa for two months, you may also want to look at getting a cheap basic phone that will work there.

Many carriers (varies by country) will unlock an iPhone for a small fee after you are a customer in good stead for 90 days or so. Once unlocked, your prepaid Vodafone SIM would probably work fine.

Thank you very much for your reply my phone is now unlocked , i called my carrier