This link should help you.

https://www.t-mobile.com/support/account/transfer-your-phone-number

Thanks...but I want to actually HAVE a landline (not just port my phone number to wireless) and I was wondering if a service other than ATT or Verizon CAN work with the T-Mobile Internet device...ie. Voice over IP etc.  Has anyone done this??

Thanks!

Tmobile use to have an agreement with Ooma, not sure if they still do.

How do I get an answer FROM T-mobile on this subject??

Thanks.

The only T-Mobile employee I ever see here is @HeavenM 

Customer Service at 611 should be able to help you with this.

T-Mobile does not do traditional land line service.  

T-Mobile now partners with Ooma for VOIP device to connect to T-Mobile Internet Gateway.

T-Mobile Promotions

T-Mobile Home Internet and Phone Deal - Get Telo Air Free | Ooma

You won’t be porting your existing number to T-Mobile.  It will be ported to Ooma instead.

Keep Your Number

Enjoy free number porting when you purchase an annual subscription to Ooma Premier, or pay a one-time fee of $39.99.

To get the free Ooma device you must sign up for Ooma Premiere service which costs $9.95 per month.

T-Mobile Internet Ooma Home Phone Promotional Terms

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Hey there @soaringpilot51 

T-Mobile did have a landline product, but we actually stopped that program about 2 ½ years ago. Many people have gone the route of putting their home number on a cell phone that they keep at home. This is actually something that I did for my grandmother a couple of years ago. She keeps that phone at home and only gives it out when the situation calls for it. 

I know that you mention that you really want to keep the landline. Is there something particular that you like about having the landline? There may be a feature that T-Mobile offers that can give you the same experience and I would be happy to discuss them in a bit more detail.

Is the “connection” to Ooma a good solution.  Does it work and what is the process of getting the interface done and keeping my Verizon landline phone number?

Thanks,

soaringpilot51