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GriffithMagenta's avatar
GriffithMagenta
Newbie Caller
Hace 4 años

Unlocked s21 Ultra showing as "Unknown Device" and not supporting 5G or Extended Range LTE on My Mobile account

I just bought an unlocked S21 Ultra directly from Samsung.  It works great, including the tmobile voicemail app and RCS through the Google messages app.  It says I'm connected to 5G on the phone, and I get 150+mbps download from home on speedtest.net

The problem is that the tmobile account website shows this:

The problems with this is:

  1. Most important: I have free phone repair insurance through my Uber Visa Signature credit card.  In the past, when I filed a claim, they required a screenshot of the account to show that I have the device I'm filing a claim for on the tmobile account that I pay monthly through my credit card.  I would have issues proving that I have an S21 Ultra on my tmobile account if it says "unknown device:"
  2. I’m worried I’m not getting the best speeds or roaming experience if I were to take a road trip in a rural setting.  150mbps+ from home is good enough in the major city that I live in, and I’m sure it’ll be better if I get closer to the tmobile cell phone tower which is 3 blocks away.

How do I get this phone to show as "Samsung S21 Ultra" instead of "unknown device"?  I don't see any option online to specify this.

  • I was told by both Samsung and T-Mobile support that both the unlocked and locked version of this phone are 100% compatible with T-Mobile's network.  Clearly they are incorrect.  

  • Gamegrrl's avatar
    Gamegrrl
    Roaming Rookie

    Exactly the same issue here with the two S21 Ultras we bought directly from Samsung. I have spent countless hours of the phone with all levels of their tech support. Each time I've been told at the end of the VERY long call that 1) they had figured out what the issue was, 2) had submitted the necessary hoodoo to get it fixed, 3) they asked me to be patient and give it 48 to 72 hours for the changes to show in my account, and 4) that they would call be back on a specific date to make sure everything was fixed.

    Not one time has anyone called me back. None of the 'fixes' ever happened.

    I'm beyond furious about this, most of all because I feel like I've been fed a ration of crapola on every call. It's ridiculous and disrespectful.

    I am extremely unhappy about this, and after years as a faithful customer who has consistently over the years promoted T-Mobile to friends and family, I no longer feel that way.

  • syaoran's avatar
    syaoran
    Transmission Titan

    It won't, unless it is a device purchased from T-Mobile.  The device showing in your account doesn't matter.  Samsung's U1 devices work exceptionally well with T-Mobile.