HELP!! Unlocked Verizon LG G3 to T-Mobile APN Settings?

I purchased an unlocked Verizon LG G3. I am trying to figure out what APN settings to use. I have searched all over and various other threads suggests different settings.
Here are the issues I have in most of the settings I've used: Poor signal, Internet but unable to download MMS, or no internet but text service. I also tried enabling roaming. So what settings do I use??

Here is what I have now:

Name: T-Mobile US LTE
APN: fast.t-mobile.com
Proxy: Not set
Port: Not set
Username: Not Set
Password: Not Set
Server:Not Set
MMSC:Not Set
MMS Proxy:Not set
MCC:310
MNC:260
Authentication Type: Not set
APN Type: not set
APN Protocol:IPv4/IPv6

These settings give me service but I am getting between one to three bars. When I used to get full bars on my t-mobile g2.