I just got off the phone with Mint and the international roaming is 10 bucks per day or 40 bucks for 7 days. So each time I need an OTP from my US bank It will cost me 10 bucks. VERY lousy deal.
If anyone comes up with a carrier that works for the banks sms, I'd sure be thankful to know. On that note, I tried both Google voice and skype (both paid) but neither worked for my banks.