Qucetel RM502-AE with TMobile 5G SA & NSA fix
Posted: Sat Nov 19, 2022 9:15 am
Hello Internet Nerds,
I want to share this post with you folks just in case there is somebody out there loosing it because their expensive RM502-AE modem fails to connect to 5G what so ever on tmobiles 5G network.
As many of you folks may have heard Tmobile has been seriously changing a crap ton of things in the back end that are breaking our mobile internet setups.
So, past week or so, my modem straight-up refused to connect to any 5G Network and would only connect when I would lock it to a 4G bands, even after me updating to the newest baseband for this modem it still didn't work.
What I noticed, when it failed to connect it just straight out refused to connect to T-Mobile's APN no matter what I tried, i tried selecting ipv6/ipv4 or IPv6 or ipv4 as my protocol it completely still didn't work.
After doing some more testing and and troubleshooting I was able to get this modem to connect to T-Mobile's 5G Network by changing the modems protocol from qmi to mbim once I did that the modem was now able to connect to a 5G Network.
It turns out T-Mobile is no longer handing out ipv4 addresses and they're forcibly forcing modems to connect using a IPv4 in IPv6 sometimes called 6in4xlat when connecting to 5G and there's a wired bug in golden orb or the modem with 6in4xlat when using QMI.
When switching over to this mode you also would want to modify your MTU settings to 1472 which I found to be the best TTL setting and my connections to my work VPN seem to be very stable now.
I'm using golden orb as my router firmware and I had to change a couple of IPv6 settings in order for the IPv4 to basically work.
I do seem to have a couple of UDP issues I have one VPN service I use and I think there might be some packet drops here and there but from my experience doing icmp pings I haven't seen any packet drops there. I was able to do some UDP rtsp video feeds test and it seemed to work just fine.
The only thing I noticed now is that my bufferbloat is pretty high now I'm not sure if it's because of the 5G bands or I'm uploading too much saturating my bandwidth but it might just be me or my antennas.
Anyways I hope I hope that this helps somebody out there.
Thanks,
I want to share this post with you folks just in case there is somebody out there loosing it because their expensive RM502-AE modem fails to connect to 5G what so ever on tmobiles 5G network.
As many of you folks may have heard Tmobile has been seriously changing a crap ton of things in the back end that are breaking our mobile internet setups.
So, past week or so, my modem straight-up refused to connect to any 5G Network and would only connect when I would lock it to a 4G bands, even after me updating to the newest baseband for this modem it still didn't work.
What I noticed, when it failed to connect it just straight out refused to connect to T-Mobile's APN no matter what I tried, i tried selecting ipv6/ipv4 or IPv6 or ipv4 as my protocol it completely still didn't work.
After doing some more testing and and troubleshooting I was able to get this modem to connect to T-Mobile's 5G Network by changing the modems protocol from qmi to mbim once I did that the modem was now able to connect to a 5G Network.
It turns out T-Mobile is no longer handing out ipv4 addresses and they're forcibly forcing modems to connect using a IPv4 in IPv6 sometimes called 6in4xlat when connecting to 5G and there's a wired bug in golden orb or the modem with 6in4xlat when using QMI.
When switching over to this mode you also would want to modify your MTU settings to 1472 which I found to be the best TTL setting and my connections to my work VPN seem to be very stable now.
I'm using golden orb as my router firmware and I had to change a couple of IPv6 settings in order for the IPv4 to basically work.
I do seem to have a couple of UDP issues I have one VPN service I use and I think there might be some packet drops here and there but from my experience doing icmp pings I haven't seen any packet drops there. I was able to do some UDP rtsp video feeds test and it seemed to work just fine.
The only thing I noticed now is that my bufferbloat is pretty high now I'm not sure if it's because of the 5G bands or I'm uploading too much saturating my bandwidth but it might just be me or my antennas.
Anyways I hope I hope that this helps somebody out there.
Thanks,