Maybe this is just paranoia, but let me know if you had similar experiences.

I've had ADSL connection from three ISP:s in Thailand: TOT (basic 2M/512), KSC (1024/512) and TT&T (premium 2M/1M). Haven't yet lived in a place where I could get CAT connection. Every one of them, even basic 2M/512 TOT was reasonable, worked very well for first two weeks. Then something happens and connection gets very unstable.

Approximately 11AM - 10PM connection is especially bad. Ping times can be exactly the same in different times, but latency changes from "almost non-existing" to "horrible". How is that possible? I'm currently using TT&T and after two weeks I lose the signal completely many times a day. I red the "ADSL troubleshooting"-thread but the problem still remains unknown.

Is there a curse of two weeks or not?

Its been like this since ADSL was introuduced in Thailand..

Once you have signed up for one year, they don't care about you anymore. It's a classic!!