Most cellular phones these days support dual SIM?. This could be one regular SIM card, and an eSIM?. However, this is how you can have 2 numbers on 1 phone. Many phones will allow you to have up to 10 eSIM profiles. With that said, if you have only one eSIM, then you can only use one of those profiles at a time. This is good for people that may be globetrotting for work. While they are in a country, they can acquire a local phone number with data services so they can make local calls. This will save on the calls from the US phone number. Voice calls with PCS1 outside of Canada, Mexico, or the US will cost 25ยข per minute for the call. Data will also have a significant cost, and all of this will apply to your Funds Pool. If you acquire a local number, then both telephone, and data will be more affordable when calling local. You could also choose to have 1 personal line, and one work line. This allows you to carry just one device, and you can have unique ringtones for each line which will help you realize how to answer the phone. The choices can be endless.