I currently have a Verizon iPhone 6s Plus and wanted to save my upgrade for next year's model. My father has a Verizon iPhone 4s and I just used his upgrade to get an iPhone 7 Plus (purchased on his account and I'm giving him my 6s Plus). I wanted to ask the experts since he's coming from an iPhone 4s micro SIM but will need to use the SIM that comes with the 7 Plus in order to use my 6s Plus, what's the best way to go about making it seamless so he has his contacts, mail, limited amount of apps. no music, etc. on the 6s Plus? Any information would be greatly appreciated!