As you know Verizon's XV6700 MMS uses the same data line as other data using programs. By default all of it is set to connect to the line. Everything except MMS you WILL be charged for. So what I do to make only MMS Conntect to data network and not have to turn off WiFi in order to do them is this.
1. Download
PHM Regedit
2. Open up a registry editor and navigate to HKLM>Software>Arcsoft>Acrsoft MMS UA>Config>UI> Change "EnableServer Edit" from 0 to 1
3. Go To MMS>MMS Configuration>Servers>Verizon Wireless>Connection via> Change to "My ISP" or "Verizon Wireless". If you have a newer ROM more than likely you have another connection setup with your carrier's name, use that, if you run an older ROM with no Carrier name in the drop down use "My ISP".
4. Go to Settings>Connections>Connections>Advanced>Select Networks> Change first one to "My Work Network"
Now when a program wants to open it can't connect to the data network. When you do MMS you can have WiFi on and it it will still connect, (Before it would fail). And to those who deny it, YOU DO NOT GET CHARGED FOR MMS, JUST MAKE SURE YOU HAVE IT SET TO DISCONNECT AFTER YOU'RE DONE. I DO MMS A LOT AND DON'T GET DATA CHARGES.
Enjoy this simple trick.