For others whom need to do the same, was able to replace my C3 Communicator with below 4G LTE GSM dialer available from Amazon.
Was able to swap T-Mobile SIM card and working as expected.
TEL-SIM400G
https://www.amazon.com/AllAboutAdapters-Voice-WCDMA-Landline-Adapter/dp/B0988WNN8T
Was able to swap T-Mobile SIM card and working as expected.
TEL-SIM400G
https://www.amazon.com/AllAboutAdapters-Voice-WCDMA-Landline-Adapter/dp/B0988WNN8T