Considering T Mobile for internet service. I have an elevator that requires a land line. Does the gateway have a port I can plug into for VoIP?
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I wanted to post an update. I was able to resolve the issue with T-Mobile by creating a VPN (virtual private network) server on my home fiber network in Minneapolis, I then obtained a router with VPN client and put it between my T-Mobile gateway and VOIP phone at the other location (Tucson). The VPN “pipe” tween the client and server passes VOIP traffic in an encapsulated manner, unaffected by whatever T-Mobile is doing. I could to do this only because I have two locations available, with two different ISP’s (T-Mobile and US Internet), in other words, I leveraged my fiber network at my other home to hide the VOIP connection from T-Mobile. This solution cost me $32 (Amazon price for the GL.iNet GL-SFT1200 router).
That is very interesting. I checked and my KVD21 is also running version 1.00.22. I went to the CallCentric website and verify that it was a VOIP service similar to VOIP.MS, which it is. So now I wonder if there's something in the CallCentric configuration that allows your VOIP to work but not mine. I use a Cisco SPA525G2 phone. So what I will do is check CallCentrics configuration guide for the SPA525 to see if there is something I can change to make mine work again.
I have been following this thread for some time as my VOIP service with VOIP.MS (and all other VOIP lines) suddenly stopped working late April 2024 (it was working for over a year).
A couple of days ago, I decided to call T-Mobile customer support to see what my experience would be like. I convinced them to escalate my issue to the Business support team since this is more of a business type of issue. I was offered Ooma, which is apparently a T-Mobile service, but I declined since I use my own PBXs and other 3rd party VOIP services. What I got them to admit is that a recent upgrade to the KVD21 (also to the new TMO G4AR gateway) prevents T-Mobile Home Internet end users from using 3rd party VOIP services. The reasoning behind this could not be explained even though I tried to extract this information, it was apparently at a “higher pay grade” than the technician I was speaking to. Long story shorter… the solution is to use my Inseego M2000 portable hotspot for VOIP.
We can hope is that if enough of us protest this feature change (“its not a bug, it’s a feature”), the engineers will revert what ever they did to block use of VOIP on T-Mobiles Internet service in a future release.
Same here as many of you. t-Mobile doesn’t support my VOIP (phonepower) service. I can receive calls, but not make outbound calls. Had to upgrade from my OBI200 to make that work, but new Grandstream device only got me inbound calls. Tech support says it’s a IPv6 issue and lack of movement from t-Mobile. VOIP isn’t the only issue, but the inability to configure static IPs for my network is even worse. Love the 5G service for speed, but half my network needs are now unfulfilled. Will jump t-Mobile as soon as better option is available. Loyalty is earned…
I recently experienced the issue many here are having. My VoIP provider is Callcentric. I have an OBi110 ATA. It has been working without any changes for a long time, first when I had Xfinity home internet and after I switched to T-mobile 5G Home Internet last year, it was also working fine with the original configurations until recently. My old ATA configurations used a callcentric.com domain. I decided to check callcentric documentation for configuring OBi110/202 devices and noticed the domain they have in their documentation is sip.callcentric.net along with a few other configurations that I did not have (e.g. setting the outbound proxy), so I made all the changes recommended in the callcentric documentation in my ATA and my service is working again. I know when my ATA was configured with the callcentric.com domain for a while it also worked with TM Home Internet, so I do believe it is likely some recent T-mobile changes and not the VoiP provider is the root cause of the service not working. Checking and experimenting with your ATA configs might help to get you service working again over TM Home Internet. Good luck!
I have a Grandstream HT801 ATA https://www.grandstream.com/products/gateways-and-atas/analog-telephone-adaptors/product/ht801
I use it with CallCentric. The Callcentric website has very clear setup instructions on how to set up a number of ATAs. https://www.callcentric.com/support/ I have an outbound and inbound call plan and voicemail. It’s just to have a landline type phone in the house and it’s $2.95/mo.
Like I said, so far so good ;)
I have used Vonage as the VOIP for about 2 years now with no issues. It would be great if T Mobile’s VOIP would work with it, but I found a viable work around and was able to keep my home telephone number.
I officially canceled my TMHI today and switched to competitor who allows VOIP. Tmobile asked why I'm canceling and they said sorry we don't offer it but maybe in the future we can upgrade our services.
I'm not sure if this is even legal!
ISPs do not have the right to block free access to the internet.
This will cause a monopoly and violates United States Antitrust Laws!
Thanks! I’ll make sure to post to this thread if/when my VOIP stops working.
I’m no expert, but my research points to either port blocking or CG-NAT IP addressing. Why it worked for a year+ and then failed is a mystery to me. TM may have rolled out a change, either to my device or to my local infrastructure. With them refusing to even acknowledge the problem, it’s impossible to know. Also, the way they they limit your access to the router, diagnosing there is impossible.
Enjoy your TMHI while VOIP works and hope that they don’t screw it up.
I’m convinced that T-Mobile is the problem, I’ve found several similar complaints about T-Mobile. It seems to be either CGNAT addressing or port blocking. I’m no expert on either. I took my VOIP box to a friend, who does not use TMHI, and it worked fine at his place.
T-Mobile refuses to acknowledge the problem or even connect me to someone who can speak to it, I get the mindless phone support agents who tell me to reboot.
After being very happy with T-Mobile HI and using a working VOIP system. I’m unfortunately forced to drop TM and get Internet elsewhere.
I wish TM would at least acknowledge the problem.
I too had my voip system working for a few years non-issue then last week it stopped. Both tmobile and my voip provider says it's each other's fault. Tmobile says to upgrade my digital phone firmware while my voip provider says Tmobile gateway is blocking the service from going through. It's been 3 working days and still no answer to the problem.
I had VOIP working with TMHI for a year, until it stopped a week or so ago.
I use OBI200 with VOIP.MS. I tried switching from OBI to a Grandstream, with no luck.
T-Mobile support is clueless, and simply tells me to reboot everything :)
From an earlier reply, moving to port 5062 did not help me.
I guess that I need to drop TMHI….
I had the exact situation like Justin0681 , my FreePbx stopped working ,with my sip trunks from http://www.phonepower.com/ , i had this wonderful setup working for years till 2 weeks ago , my biz got interrupted by tmoble competing to the quality of service we used to suffer from ATT. lost 2 days figuring it out , finally called Ooma and sent me office connect 3000 with the called 4.5 G, and got my system working avoiding Mobile restriction., let us say tomobile butchered it’s own customers to force them move to ooma even ooma is a service from tombile new monopoly for some not some based on lump sum biz only. I got my system working but omma can not get 5g as tombile but was good enough to keep the sip trunks working at full power. tombile is going through the degenerate again process towards extinction.
Moving to port 5062 did not help me. :(
We’ve had VoIP phones running on a few T-Mobile Home Internet devices for over a year (we do not use the internal WiFi on the gateway - we use independent mesh routers, which shouldn’t matter). Within the last month, our VoIP phones stopped working. After HOURS of trying to figure out why (and a long call with T-Mobile customer care that had no idea why VoIP wouldn’t work anymore), I discovered that our TMHI gateway had spontaneously started blocking Port 5060, which is most commonly used for SIP (VoIP) traffic. Changing our VoIP port (to 5062 in our case) solved the issue immediately. The available alternative ports you can use for VoIP differ, depending on your VoIP carrier.
Two days ago, our second TMHI gateway started blocking Port 5060. So, I had to switch the port on those phones as well. It appears T-Mobile pushed an update to at least some of their gateways (ours was an Arcadyan) that caused this inexplicable issue. I HAVE NO IDEA WHY, and apparently neither does customer service. I spent hours and hours trying to fix it and it was pretty frustrating.
Now my worry is, if they are going to start randomly blocking ports used by SIP, will they eventually block the new ports we are using? We depend on our VoIP phones for our business. If they keep doing this, we are going to have to dump T-Mobile. They need to fix it. If they are going to market themselves as a legitimate internet service provider, they need to act like one and stop doing things like this.
Anyone heard if T is fixing this issue?
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