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Looking for work around using Maestro C with iPhone hotspot T-Mobile

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Bob KN4HH
Bob KN4HH Member ✭✭
edited March 18 in Remote Operation (SmartLink)

For years, I was able to use my Maestro A in my car using my iPhone cellular hotspot running on T-Mobile very successfully. My Maestro C is due to ship soon. I hate to see it as an expensive paperweight. T-Mobile now appears to be blocking UDP traffic (at least UDP port 4993). This was determined with a Flex trouble ticket which explored all aspects of my operating environment. Rather than changing providers, I would appreciate any suggestions on how create a work around to recover the missing UDP data.

73, Bob, KN4HH

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  • dwcolvin
    dwcolvin Member ✭
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    Are you sure it isn't because T-Mobile uses CGNAT, and translates everything to/from IPV6?
  • Mike-VA3MW
    Mike-VA3MW Administrator, FlexRadio Employee, Community Manager, Super Elmer, Moderator admin
    edited April 14
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    If your Maestro A works as a client on a Hotspot, there is no reason why the Maestro C won't work. This does work even if it is a CGNAT network.

    However, since you worked with the Support staff they must have found something different. I looked for your support ticket regarding the Maestro C and I was not able to find it.

    I can see that it would not work if the Radio was on the HotSpot as that is a totally different thing.

    The only way around is to run a SoftEther VPN from the HotSpot to the Radio. This would likely require having some sort of Router connected to the Hotspot and the Maestro plugged into the Router.

  • Bob KN4HH
    Bob KN4HH Member ✭✭
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    Thanks for your comments. The help desk determined that T-Mobile is blocking UDP traffic, at least in the hotspot mode. Interestingly, on random days and hours of the day, UDP port 4993 becomes unblocked and I can connect via Smartlink and my mobile hotspot. I have been unable to reach anyone at T-Mobile that understands my issue. I operate what I call “Maestro Mobile” where I use the Maestro temporarily mounted on my center console and I access my mobile hotspot for connectivity. If I can not find a solution with T-Mobile, I am thinking about a mobile hotspot provider with pay as you go for the timesI do operate mobile.

    Sorry for the bandwidth. It is an extremely frustrating issue. Thanks for your patience.


    Bob, KN4HH

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