Default Wi-fi calling on Verizon Note 3 with T-Mobile SIM?

I've searched for the answer for this, but found nothing...I apologize in advance if this has already been asked.

I have a Verizon Note 3 with a Tmobile SIM/Service, and would like to use the wifi calling/UMA feature that T-Mobile offers. In my office the network coverage is non-existent for all carriers, but there is wifi access. I can get online fine, but can't send a text or make calls. From what I understand Verizon has this feature blocked (or non-existent), Can I flash a T-Mobile ROM to activate this feature, or if I install a developer ROM, will this feature be available?

Thanks for any input!