International dual SIM iPhone 14 Pro
I have an unlocked iPhone 14Pro. I have a US number on it. I am going out of the US for a year to South Africa. Can I have a US phone plan and a South Africa phone plan on this phone. I understand I will have two phone numbers one which will be a South Africa phone number and my original US phone number. I have been told that if I have my phone outside of the US for longer than 3 months, the carrier will cancel my plan and my US number. I don’t understand this as I would be paying for the US plan monthly via auto payment from my US bank account. I am trying to make sure people in US can reach me via voice mail or text even if my US phone number is not connected or is not in cellular range. What happens now is every time I leave the country and my phone is on airplane mode and I am not on Wi-Fi, the US caller gets a message saying the phone number is not available and gives the impression the number is no longer in service.
What is the best, most inexpensive way to deal with this situation please.
Thank you.
iPhone 14 Pro