Ok my mom has a 4s that she used my upgrade for when I had an old env touch II. I'm on Verizon and have anniphone 5. I would LOVE a bigger screen and the 5s/6 rummors seem legit to me. Can I just transfer her upgrade to my line because she doesn't want a new phone. Can I do that on Verizon? Or should I wat for the next gen after 5s/6?