REG99 "Unable to connect"

pglconsult1

    I just purchased the LG V10.  I want to use the wi-fi calling feature but it won't connect to my home network. I get a REG99 "Unable to connect" error message.  It connects to other networks outside of my residence.  Any suggestions?

      All replies

      • Make sure your E911 address is selected in My T-Mobile - Profile - Account Settings.

          • pglconsult1

            Re: REG99 "Unable to connect"

            Thanks for your quick reply.  I just checked my settings and the address is correct.  Any other ideas?

              • Are you using your own router or Tmobile personal cellspot router?

                  • pglconsult1

                    Re: REG99 "Unable to connect"

                    I have a router provided by Comcast. 

                      • You may need to call Comcast to make sure you or they can configure UDP port 4500 on the router for T-Mobile configurations.  T-Mobile also offers an ASUS TM-1900AC Cellspot for either free or a $25 deposit.  Saves the router rental from Comcast and ensures proper setup by default.

                         

                        You will need to ensure that certain ports and protocols are not locked down on your firewall. IP Range & Port to be whitelisted:

                        208.54.0.0/16 Port UDP 500, UDP 4500

                        66.94.2.0/24 Port 443

                        66.94.6.0/24 Port 443

                        66.94.7.0/24 Port 443

                        66.94.8.0/24 Port 443

                        66.94.9.0/24 Port 443

                        66.94.10.0/24 Port 443

                        66.94.11.0/24 Port 443

                         

                        Comcast might be able to assist, given it is their router.

                        1 of 1 people found this helpful
                          • edwardp

                            Re: REG99 "Unable to connect"

                            If the original poster has an Arris gateway, WiFi Calling will not work, period. I believe it has something to do with the gateway sending an IPv6 address to the phone.

                             

                            With straight IPv4 addresses coming from a separate router, WIFI Calling works perfectly.

                             

                            Port settings have no affect, since I once tested this by complately disabling both IPv4 and IPv6 firewalls on the gateway and WiFi Calling still didn't work afterwards.

                  • bkinfinite

                    Re: REG99 "Unable to connect"

                    Check the channel your wifi router uses---I think it has to be 2,6 or 11. Don't quote me on that though. I use 6 and it works fine. I haven't been terribly impressed by the wifi calling on my phone. Resetting the router can help, assuming you've had success at some point getting through. It could be relating to other settings on your router--check security/firewall issues.

                    • pglconsult1

                      Re: REG99 "Unable to connect"

                      Thanks everyone for all of your invaluable advice!  I went out of town with the phone and, when I logged onto my other wi-fi network at a different location (using my own router and NOT the one I rent from Comcast), the phone worked beautifully on the wi-fi calling.  I'm now convinced that it has something to do with the router at my other location in Maryland and I will check it out when I get back there in a week or so.

                        • snakeyes

                          Re: REG99 "Unable to connect"

                          I've had several Samsungs, LG, motorola, and every phone I've owned including my newest does either the reg 99, forbidden, or some other error code and it happens daily. Here's the best fix I found:

                           

                          Toggle Wi-Fi and turn off Wi-Fi calling off, toggle Bluetooth on for about 10 seconds or so, toggle Bluetooth off, toggle Wi-Fi and Wi-Fi calling back on. 8/10 times this works for me, the other two I have to restart the phone.

                           

                          I have the T-Mobile ASUS router so that's not the problem, and I've had several routers over the years through Comcast, CenturyLink, third Netgear, etc.. they all do it. It doesn't matter if I'm on my Wi-Fi network or not, the phone's going to produce an error with Wi-Fi and that's just all there is to it.

                           

                          It's still a convenient app if you're in an area that has zero service but I am surprised that 8 years later this problem still exists without T-Mobile support being very knowledgeable about the situation. I've received a lot of answers from them but nothing has ever made the issue go away.