VoIP with t-home internet

In my case, it is a 100% fail. No puedo despachar o recibir llamadas. Tech support for the application I am trying to use told me what ports T-Mobile had to open to allow the service to work, and I gave them to T-Mobile, but I still don't have active service. I am resolved to use my cellular data (T-Mobile 😏 ) to make and receive phone calls. 

I have the same problem with MagicJack. Mostly on outbound calls. The other party cannot hear me but I can hear them. It works sometimes. Less than 50% of the time. Sometime it will work for a second or two then the other party stop hearing me. If it is firewall settings, port blocking, SIP ALG, wouldn't it fail 100% of the time? 

I had the same thing happen to me as "Person". After doing some research Customer support said "We know that VOIP service won't work with the home internet, we are working on it and will inform you when we have a solution". I wasn't looking for Magic Jack, but another service I use. I tried using another router but it didn't solve the problem. Google Voice works fine. But Denwa "My Ecuador VOIP service" rings but never connects. As soon as I switch to another network, it works perfectly. 

Yep, cancelling. What a joke that I can’t use my VoIP phones on it

If T-Mobile is still blocking the necessary ports on its grey Gateway router, how does a MagicJack work when plugged into it?  My VoiP phone requires ports 5060-5070 for communication with the server and UDP 10000-20000 ports to be open for two way voice communication.  I have yet to find a workaround.

Person wrote:

Just spoke with a girl called Crystal from the customer service . Waiting time was zero minutes. She told me that they are aware of the "problem" that many VOIP devices can't function by default. She also assured me that it's a matter of sending request to register a particular device with them (in my case it's a Grandstream GS-GXP2140 VOIP desk phone). Which she did sent.

She collected my download and upload speed (asked me to test it in real time).

I am still kind of skeptical based on reviews here that say that all these reps do is lying to you. However, she told me to wait 24-72 hours and gave me "complaintID" I could use to  track the status of the request.

I’ll keep you guys posted.

Ok, here is my report: nothing happened. Nobody contacted me, the problem wasn't fixed. At all.

Just spoke with a girl called Crystal from the customer service . Waiting time was zero minutes. She told me that they are aware of the "problem" that many VOIP devices can't function by default. She also assured me that it's a matter of sending request to register a particular device with them (in my case it's a Grandstream GS-GXP2140 VOIP desk phone). Which she did sent.

She collected my download and upload speed (asked me to test it in real time).

I am still kind of skeptical based on reviews here that say that all these reps do is lying to you. However, she told me to wait 24-72 hours and gave me "complaintID" I could use to  track the status of the request.

I’ll keep you guys posted.

We use MagicJack on our T-Mobile home internet, and have not had any issues. I plugged the MagicJack directly into the ethernet port on the 5G device (the gray gateway) and MagicJack works without issues.

Depending on which gateway you have your VoIP will work or not. the Nokia gateway’s firewall does not allow traffic through SIP ports (5060 etc.) I don’t know the specifics of Magic Jack but if it uses SIP protocol it won’t work.

The Askey LTE gateway works with VoIP phones.

I just went through the pain of upgrading to the nokia 5G and then reverting back for this very reason plus the fact that the speed on the Nokia is totally inconsistent. I have a SIP phone at home with 3 international accounts on it that our close relatives use and we just *have to have them working*.

The Nokia has a Tmo firmware on it which provides a very basic (sub-par) router feature.

da.down -  good suggestion, with the adapter sounds like it would/will work.   Nice to know there are other options.  But still seems still  needing (VOIP - Internet)   and not (VOLTE - Cell Tower) again but depended on internet. I could say that I haven't looked into the adapter and google voice much so I could be wrong.