GT-sim is now finally charging for outgoing SMS
(incoming is free).
Same price of Eur 9c whether roaming or on home network is listed on rate sheet, but the first few were charged at 11.1c (not sure if that's a billing error that was fixed - what has anybody else been charged?). Most recent is 9c.
The charges don't appear to be backdated.
Sims: Telcel MX, T-Mobile US, Virgin Mobile UK, Orange UK, Knowroaming
Voip: Localphone UK, Anveo US, Google Voice