Can the Verizon iPhone 4 make simultaneous data and voice calls?

No. One drawback of CDMA network technology is that the Verizon Wireless iPhone 4 will drop data connections for incoming calls. You must hang up the phone before checking your web browser or sending an SMS.

In contrast, the AT&T Mobility GSM network allows simultaneous data and voice calling. This means you can talk on the phone while sending text messages or browsing the web.