This message may be a bit long so I apologize. I own an iPhone 13 Pro Max and I’m seriously thinking of buying the 15 Pro Max when it comes out. But originally my carrier was Verizon but about a year or more ago I converted to Spectrum, a cable, internet and wireless carrier in my area. When i did so the Spectrum rep installed a Spectrum SIM card in my phone and no issues. But when I order a new phone from Apple I’m pretty sure a Spectrum SIM card will not be available from them. So how do I get my new iPhone to work with my carrier and get all the info from one phone to the other without lengthy delays or issues??? Any advice or help appreciated. I’m really nervous about this issue.