Do I need a certificate of residence to get a permanent number for my tourist SIM in Thailand?

The user is inquiring about the requirements for converting a tourist SIM to a permanent number in Thailand. While there is a belief that a certificate of residence may be needed, several comments suggest that only a passport and a small fee are necessary for the conversion. Users have shared their experiences with different telecom providers, noting that they often only required basic identification and were not overly concerned with the specifics of visa status. However, one comment cautions mentioning that a residency certificate might be required under certain circumstances, depending on the telecom company.