[TheMadBrewer]

As for O9, rates to Iceland Mobile are in the .59 Euro range -- the sticky says there is a .25 Euro setup charge but I can't find mention of that on their website. That would make it way more expensive than UM.

0044 (IOM) is on the order of .55 Euro to a UK Mobile, similar to TravelSIM

So far, it looks like only UM has a special subscriber to subscriber rate.

As for the high termination rates for Lichtenstein, Iceland, Estonia, etc -- I don't view it as a conspiracy, but rather somebody has to pay for the free incoming calls (i.e. TANSTAAFL). I see people here bragging how they've had a UM (or other) SIMs for years and still have the original credit. How is UM (or others) to recoup their costs? When (if?) there is a EU wide agreement on roaming charges I think the need for these international SIMs will decrease (assuming its a good agreement). I do realize that they are used lots of places outside the EU but I would hazard that the EU (or EU + EFTA) is a big chunk of their business.