Use ATT Iphone 6 on Verizon?
I'm considering using my upgrade from work to give my wife a new iPhone 6 because she is off cycle. She has Verizon, I have ATT. I've read that you can take the Verizon iPhone 6 and use it on ATT even during the contract period but can I buy a iPhone 6 from ATT and just pop the Verizon sim in and good to go? Don't really care if it doesn't get the best LTE speeds or whatever, just that it works and works at some speed 3G equivalent or better.
Thanks