Is it easier to extend a 30/45 day visa exemption in Bangkok or Ko Samui, and how does the timing of the extension affect the validity?

When considering the extension of a 30/45 day visa exemption stamp, many users express that the process is generally straightforward in both Bangkok and Ko Samui. However, based on user experiences, Bangkok may offer quicker processing times, typically around 30 minutes if visited early in the day. The extension is added to the existing visa validity date, regardless of when during the initial period you apply. It's recommended to visit the immigration office where your TM30 was filed, and the choice between Bangkok or Ko Samui should depend on your proximity to these offices.