Apparently this issue with the No USIM code is on going (May2024).
My first Gateway failed after about 12 months. No biggie. Tecnical service got me helped out, and i receive the new Gateway 4 days later (Yesterday). I attempted to set it up today, and got the errror code "No USIM" immediately. My patience is now running thin. I do not want to waste more time. Am i best off taking the unit to my local T-Mobile tomorrow?
For What its worth...T-Mobile please put a list of trouble shooting options and/or Q&A lists with tbese gateway device packages. In my experiences it's not uncommon at all to have trouble with refurbished devices.
Thank you