[wolfbln]

Yeah. You simply don't seem to understand.
There are no unlimited roaming SIM cards on the market. It's a hoax of the industry. Many SIM cards advertise as unlimited, but in fact are not.
Unless you apply the label "unlimited" to any open data allowance on a SIM card.

Let's check your proposals:
1.) BNE SIM card: "unlimited" in Europe. Limited to a 100GB FUP. This is may be called almost unlimited, but you can't restart/renew "unlimited" for an additional month.

2.) AIS Traveller SIM: "unlimited" up to a certain limit of max. speed, throttled beyond. SIM is very hard to maintain as validity is severly limited on Thai SIM cards. You essentially need to top it up every month to keep it alive.

3.) MTX Connect: They offer an "unlimited" day rate. It's not clear how they restrict access. Their T&Cs give a lot of room for speculation: 'if per-day plan doesn’t contain data usage cap it is considered an “unlimited” plan.' But does this mean unlimited at max. speed? Connection in the US is to Sprint (!) network only and in China to China Telecom (!) only which are mostly CDMA-networks not compatible with 95% of devices sold worldwide.

4.) The hi! Tourist SIM card of Singtel: It gives really 100GB in Singapore on the Singtel network. I checked that. But these are local data of a local network, not roaming data. There are local SIM cards in many markets giving endless or almost endless local data ....

5.) Taiwanese Tourist SIM cards: Most "airport plans" for tourists in Taiwan give out unlimited data indeed. But again these are local data, not roaming data. To offer unlimited data on a national plan is not so unusual.

What I want to show is, that it doesn't make sense to compile such a list as long as you don't mention the restrictions. They are still so severe, that they are very likely to kill the offer for most interested users. By just dropping names and not telling these limits, you are fooling the user.

And these limits can be very well hidden indeed. Take for example T-Mobile's US roaming plan for many countries giving out "unlimited" roaming in 140+ countries. But their "unlimited" is throttled to 2G speeds from the start. Furthermore, they monitor your consumption and your domestic US usage must be higher that in international roaming...

I still think, it only makes sense to have a list like this when we tell the full truth about the offers, because "unlimited" is not really unlimited most of the time.