I bought my Note 20 5g directly from Samsung - unlocked. I first used it with Straight Talk simply by taking the sim card out of my Note 10 and using it with the Note 20. 3 months ago I switched to T-Mobile for 5g availability. Great service at home, but encountered many dead areas in nearby towns and when traveling. I decided to change back to Straight Talk as my wife and I need the phone connectivity more than the fast data when traveling. However, when trying to register a Verizon compatible sim card with Straight Talk they told me my IMEI number is blocked. Evidently using it for 9-10 months without registering it resulted in it being blocked. I had to resort to using an AT&T compatible CDMA sim card. Is there a way to get the IMEI unblocked so I can use a GSM card instead?