First I've heard of this. They are now billing Thailand a weekly charge to their phones. It's only around .30 a week, but if you don't pay it they won't let you access your account.
They have been locking accounts and making you use a new security system. This is part of the new system. They send you a code and say if you want to keep using it, they give you 7 days free then you are billed weekly.
Enjoy.
