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
<p>Updating my Omni IIe and OmniTouch where was able to download and update to Omni IIe 4.0B firmware. But unable to download OmniTouch 7 v1.17 firmware file as downloads as 0 KB file. Am able to download OmniTouch 7 kernal v1.2 firmware where file size is is 3,397KB. Deleted both files and...
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