Thru my work I got a free phone to use. Wanting to try an Android, I got the Verizon Xperia z3v. I tried to like it but IOS is so much better. Even the apps which are the same for Android run better in IOS. My question, will I get "full" use of my phone (VOLTE) if I transferred the Verizon sim card to my unlocked ATT 6+ phone?