How do I add a non t-mobile phone number to my t-mobile account.
Hi
Are you trying to port a number from another carrier onto your existing T-Mobile account? Port Mobile Number: Switch to T-Mobile & Keep Your Phone Number | T-Mobile
Are you trying to have your T-Mobile and non-T-Mobile number on the same phone? You can do that if your phone supports dual sim. SIM card & eSIM | T-Mobile Support
I hope this information helps, but I am also happy to provide more answers if you need them.
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