You can't it's the same as Sprint. It worked up to the Samsung S4. With Sprint and Verizon you can't access data while talking period, with T Mobile and AT&T you can. I am willing to accept this with Sprint because it's $60.00 a month unlimited everything but at high price of Verizon it's unacceptable. Most of the technical support people don't even know this and when they speak to someone who verifies it to be true they seemed shocked.
See Quoted Text:
"The only way Verizon and Sprint can offer simultaneous voice/data capability is via Wi-Fi—a connection that's hardly easy to obtain or maintain when you're on the move. Absent of having a Wi-Fi connection, Verizon and Sprint Samsung S6 Phone users will receive a message that reads "Cellular data connections are not available during this call" when they try to launch the Web browser—or any Internet-based app like Facebook or Twitter during a call."