I think every SIM needs to be registered with a passport, or Thai national ID.

The ZEED (AIS) SIM is focused on streaming media - with free audio streaming, bundled free Youtube and free gaming.

All providers are offering unlimited volume with fixed bandwidth, at very low prices. Bandwidth comes in 1, 2, 4, 6 and 10 Mbps, over 1,7,30 and 365 days. There are many, many, many, many options. You can get 1 Mbps unlimited for 1 year for 1,200 baht.

If fixed bandwidth suits your needs, and it does for most I'd imagine - I probably don't need the 130 Mbps download speed I get with DTAC - then you can save a few hundred baht. You'll just need to suss out the SIM, top-it up, find the proper codes and away you go.

This website, and associated Twitter feed and FB page is updated daily, you can use the codes with or without the reseller referral six digit adder. ProsermThaisim - ???????? AIS ????????? ??????? AIS

Regarding the "traveling" SIMs: SIM2Fly (AIS), SIM Go Inter (DTAC) - these are purchased in Thailand for use in other countries - I think you can add this feature repeatedly to an existing AIS SIM2Fly SIM, or purchase a new standalone version, but maybe not with the DTAC version (now?) Both can be converted back to standard Thai SIMs when you return.