Yesterday I brought a prepaid true move h sim for my iphone on the 499 plan

The sim came with a black card but I wasn't told what this was for and when I check my credit it says I only have 1.07 baht instead of 499 although when I use it my credit doesn't seem to go down.

Can anyone tell me what this card is for? And do I need to top up the credit as it keeps telling me before every call I make.

I had the same with a True SIM for my Dongle. It says 1B of credit but has 499B of credit for data. The only way you can see that is to go to http://hlife.truecorp.co.th/ whilst on data.

Hope that helps?

First you buy a sim card and it is topped up with cash which is then run down as you pay as you go.....

If you then purchase a plan, the cost of that plan is deducted from the cash stored on the sim and as you use the phone under the terms of that plan the residual cash on the phone stays static.