I just got an 8 with a Verizon SIM preinstalled (Verizon Device Payment plan) but I plan to keep my SE that I own outright for traveling, general backup, etc. I assume what I want to do here is just destroy the SE SIM and move the SIM in the 8 back and forth as needed. What should I be doing with the phone that isn't in use? Airplane mode? Off completely? And and powere on with wifi? I guess what I'm trying to do is avoid getting texts, reminders, gmail, etc. on both phones at all times - I think. Or maybe it is better to have both phones receive all the same notifications so that I can just grab one and go, the only difference being which one has cell service based on the SIM? Not really sure what the best way to approach two iPhones with one SIM is, so any feedback is appreciated. Thanks.