Not sure, but it looks like TrueMove H have re-packaged their pre-paid and post-paid service offerings into groups:

http://truemoveh.truecorp.co.th/

iPlay http://truemoveh.truecorp.co.th/packages/iplay/entry/604

iTalk http://truemoveh.truecorp.co.th/packages/italk/entry/596

iNet http://truemoveh.truecorp.co.th/packages/inet/entry/583

iSmart http://truemoveh.truecorp.co.th/packages/ismart/entry/594

iPlay - prepaid?: http://truemoveh.truecorp.co.th/toppings/iplay/entry/654

iTalk, iNet, iSmart - pre-paid?: http://truemoveh.truecorp.co.th/toppings/italk/entry/653

Not sure if I understand all the positioning yet, nor how it might impact existing customers.

pre paid might be affected, but post paid for existing customers will not as i have not been contacted or anything and i am on postpaid.

thats not to say, they will change without any notice