What are the best mobile phone SIM and Internet packages for expats in Thailand for short stays?

This discussion seeks advice on the best mobile phone SIM and Internet packages available in Thailand for a stay of up to three months, particularly for a setting without existing Internet. Suggestions include purchasing SIM cards from local shops rather than the airport, which tend to be more expensive. It's also noted that packages typically offer one connection per SIM, but a WiFi dongle could be used to allow multiple connections by pairing it with separate SIMs. Recommendations for providers include DTAC, AIS, and True Mobile, with the option of using personal hotspots. Users are advised to check online for current packages and consider local insights on the best service provider for their specific location.