I'm sorry, but you're wrong. I have SMS payments for two of my games in 30+ countries worldwide. You can use the same code as long as it is free to register. B

I'm sorry, but you're wrong. I have SMS payments for two of my games in 30+ countries worldwide. You can use the same code as long as it is free to register. But the whole code story is completely irrelevant! If malware is installed in your Android phone it can send any arbitrary short code it wants, without you noticing. What is important is the number to which you send the code, and this is different for each country (and even different for different carriers in some countries). So, a well coded malware with international support would need to know the premium payment number + code pairs for all the countries the attacker wishes to gather money from.