People who have DTAC prepaid sim cards can change the registration details using the DTAC app. This afternoon, I changed my prepaid DTAC sim card linked to my Thai bank accounts which was registered with my wife's ID card to my name. I couldn't get the process to work using my UK passport number (even though the app says it can be used), so I had to use my pink ID card number. It was pretty straightforward once I understood the requirements. I had to upload a picture of my wife's ID card, a selfie of her and then I could edit the ownership details. I was surprised that I didn't have to upload a picture of my pink ID card. Unfortunately the process is all In Thai, so it is a bit challenging if you don't read Thai (which I don't). I had to keep taking screenshots and using Google Lens to translate them for each step. After completing the process. I used the *179*<my pink id number># to confirm that the sim is now registered with my ID number. Still preferable to the 80+ Km round trip to my nearest Dtac Centre.