The SOC code for the plan is MI30TI for taxes included plans (most people) and MI30TE for taxes excluded (those on plans like simple choice that don't include taxes).
I was personally able to sign up for this plan on a new account earlier today via T-Force on twitter (@tmobilehelp). I simply asked for the "Basic Mobile Internet 30GB Plan". I also had a spare SIM card laying around that they were able to activate immediately, and they kindly waived the activation fee (called "DCC" or "Device Connection Charge"). YMMV on if they're able to waive that fee though.
Also, if you ever did the T-Mobile "free trial" that came with the free hotspot to use, that device will technically work for this plan, but you won't have 5G since it's an LTE modem.
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I had a question of how to activate this SIM without a hot-spot if it was to be used on a phone - Found this reddit thread as an answer - https://www.reddit.com/r/tmobile/...&context=3
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https://www.rvmobileint
If they ask you for an IMEI, you can use this link to generate one - https://www.imei.info/imei_generator/


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I hope it'll work in an iPhone - with multiple phone lines on Go5G+, I don't really have any need for hotspot. But I could use an extra line with texting and data so that I can port in a number that I have with Tello for a Zelle account.
Reddit comment:
Got it - 3 lines at $10 with autopay. The number you provided worked; but they said they couldn't waive the activation charge of $35, but stores might be able to to.
Went into a T-mo store but they also couldn't waive; they suggested I go to their kiosk at Costco (apparently activations through Costco are waived). 15 minutes later walked out with 3 activated sims / lines with no upfront charge; didn't need IMEI or any other detail other than personal id.
you cannot replace a home internet connection with these.
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Can I presume they can tell if I try to use it with a Roku?
Will be using the sim in an old phone and use it for wifi in my car. Good stuff!
They do require proof of Costco membership (your Costco membership number).
https://www.costco.com/t-mobile-b...wcase.html [costco.com]
I got the hotspot and it's being shipped in 2 days, we'll see how it goes.
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