I am using a verizon iphone 6 with AT&T sim. I was using the same sim in my 4s and i used scissor to cut it as a nano sim. Almost everything works except for the following 1) Visual voice mail do not work. It wont even show if i have a new voice mail. the screen is just blank saying "No Voicemail". I can call VM after pressing and holding "1". I tried most of the suggestion i read including resetting the network, checking carrier update etc...but nothing works. 2) LTE and 4G dont work. I have to use unlockit.nz to install an APN to get 4G. Even after install profile (LTE profile) i dont get LTE. So i have to switch to generic AT&T profile to get it work. I havent tried to get a new SIM card from AT&T which i am going to try today. But if anyone have any suggestions i can try that. If anyone can help that will be really appreciated.