I want to know how I can use my Wifi Modem on another network provider.
Unlock your mobile wireless device
That is the link on how to get devices unlocked (I don't know how it exactly works for a modem).
Whether or not it will work on another provider, and how to configure it is a question of the other provider.
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Manage your T-Mobile account
Use the T-Mobile App or your My T-Mobile account
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