So, for the past two years I've had a 6+. My 4.7 iPhone 7 was received launch day. Love the phone but sometimes find myself missing the large screen. I have no intention of exchanging because in many cases, I find the smaller form factor to be superior in terms of ease of use. I work a desk job and still have my 6+ sitting on my desk. I've realized that if I want to have a larger screen, I can essentially still use it whenever I want to via wifi (my iPhone 7 even pushes phone calls to it!) My only issue is with iMessage. It will not allow my phone to use my number to send or receive texts. My old SIM is still in there, so the phone still knows it has a phone number. In the past, just messing around, I've been able to achieve this. Of course now when I want to do it "for real", it won't work. Has anyone been able to achieve using an old SIM to use a number with iMessage, and if so, how did you achieve it?