Use of Verizon iPhone X with European SIM Card
I have an iPhone 6 Model A1549. Am considering buying an iPhone X and giving the 6 to my wife. Currently on ATT (GSM.) If I buy a Verizon iPhone X (CDMA) and pay out the phone cost over 24 months, can I use it with a European SIM card while paying out cost of the X? Can I use it with European SIM even if I pay off the X?
And, if so, will it have my contacts available? I would also want to transfer my iPhone 6 to Verizon for use in US only.
I've been getting conflicting info on this.
Thanks,
Marv Freid