Hi, I currently have an iPhone 8 plus with Xfinity Mobile that I got during the $200 Visa gift card promotion and have been very happy with the service. I am thinking about adding another line for someone else in the family and taking advantage of the new $250 Visa gift card with a Samsung phone purchase, hopefully with the new S9 if it arrives in time for the promotion. I generally prefer Android, and the rest of my family prefers iOS, but I got the iPhone because of the deal. If we add a new line with a new Samsung phone, can I switch the SIM cards so that I can put my phone number on the Samsung and they can get their number on the iPhone? I have seen other people post about switching SIM cards between two Xfinity phones, and it seems like that's not a problem. But, would that have any impact on my eligibility for the two Visa gift cards? Thanks for your help!